que se leu este artigo
array:22 [ "pii" => "S0870255124001872" "issn" => "08702551" "doi" => "10.1016/j.repc.2024.04.006" "estado" => "S200" "fechaPublicacion" => "2024-07-24" "aid" => "2343" "copyright" => "Sociedade Portuguesa de Cardiologia" "copyrightAnyo" => "2024" "documento" => "article" "crossmark" => 0 "subdocumento" => "rev" "abierto" => array:3 [ "ES" => true "ES2" => true "LATM" => true ] "gratuito" => true "lecturas" => array:1 [ "total" => 0 ] "itemSiguiente" => array:17 [ "pii" => "S0870255124002208" "issn" => "08702551" "doi" => "10.1016/j.repc.2024.03.005" "estado" => "S200" "fechaPublicacion" => "2024-08-07" "aid" => "2351" "copyright" => "Sociedade Portuguesa de Cardiologia" "documento" => "article" "crossmark" => 0 "subdocumento" => "fla" "abierto" => array:3 [ "ES" => true "ES2" => true "LATM" => true ] "gratuito" => true "lecturas" => array:1 [ "total" => 0 ] "en" => array:12 [ "idiomaDefecto" => true "cabecera" => "<span class="elsevierStyleTextfn">Original Article</span>" "titulo" => "Initial experience with orbital atherectomy in a non-surgical center in Portugal" "tienePdf" => "en" "tieneTextoCompleto" => "en" "tieneResumen" => array:2 [ 0 => "en" 1 => "pt" ] "titulosAlternativos" => array:1 [ "pt" => array:1 [ "titulo" => "Experiência inicial com aterectomia orbital num centro não cirúrgico em Portugal" ] ] "contieneResumen" => array:2 [ "en" => true "pt" => true ] "contieneTextoCompleto" => array:1 [ "en" => true ] "contienePdf" => array:1 [ "en" => true ] "resumenGrafico" => array:2 [ "original" => 0 "multimedia" => array:7 [ "identificador" => "fig0010" "etiqueta" => "Figure 2" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr2.jpeg" "Alto" => 1693 "Ancho" => 2667 "Tamanyo" => 500627 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0050" class="elsevierStyleSimplePara elsevierViewall">Illustrative example of IVUS-guided, OA-facilitated PCI of a calcified RCA. A1: severe diffuse calcified lesion on the proximal and mid segments; B1: OA placed in the mid segment of the RCA and several advancements and retreatments were made; C1: final angiographic result after stenting from the mid-distal segment trough the ostium; A2: severe 360° calcified lesion of the RCA; B2: revaluation after OA showing adequate sanding (echo reverberations) and luminal gain; C2: final imaging after stenting showing overall good apposition and expansion. IVUS: intravascular ultrasound; OA: orbital atherectomy; PCI: percutaneous coronary intervention; RCA: right coronary artery</p>" ] ] ] "autores" => array:1 [ 0 => array:2 [ "autoresLista" => "Daniel Faria, Hugo Vinhas, João Bispo, João Guedes, Sandrine Marto, Hugo Palmeiro, Patrícia Franco, Jorge Mimoso" "autores" => array:8 [ 0 => array:2 [ "nombre" => "Daniel" "apellidos" => "Faria" ] 1 => array:2 [ "nombre" => "Hugo" "apellidos" => "Vinhas" ] 2 => array:2 [ "nombre" => "João" "apellidos" => "Bispo" ] 3 => array:2 [ "nombre" => "João" "apellidos" => "Guedes" ] 4 => array:2 [ "nombre" => "Sandrine" "apellidos" => "Marto" ] 5 => array:2 [ "nombre" => "Hugo" "apellidos" => "Palmeiro" ] 6 => array:2 [ "nombre" => "Patrícia" "apellidos" => "Franco" ] 7 => array:2 [ "nombre" => "Jorge" "apellidos" => "Mimoso" ] ] ] ] ] "idiomaDefecto" => "en" "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S0870255124002208?idApp=UINPBA00004E" "url" => "/08702551/unassign/S0870255124002208/v1_202408071222/en/main.assets" ] "itemAnterior" => array:16 [ "pii" => "S0870255122005224" "issn" => "08702551" "doi" => "10.1016/j.repc.2022.12.004" "estado" => "S100" "fechaPublicacion" => "2022-12-18" "aid" => "2078" "documento" => "simple-article" "crossmark" => 0 "subdocumento" => "rem" "abierto" => array:3 [ "ES" => true "ES2" => true "LATM" => true ] "gratuito" => true "lecturas" => array:1 [ "total" => 0 ] "en" => array:8 [ "idiomaDefecto" => true "titulo" => "WITHDRAWN: Cardioprotective role of GABA-B receptor activation on ventricular arrhythmia following myocardial infarction" "tienePdf" => "en" "tieneTextoCompleto" => 0 "tieneResumen" => "en" "contieneResumen" => array:1 [ "en" => true ] "contienePdf" => array:1 [ "en" => true ] "autores" => array:1 [ 0 => array:2 [ "autoresLista" => "Tânia Martins-Marques" "autores" => array:1 [ 0 => array:2 [ "nombre" => "Tânia" "apellidos" => "Martins-Marques" ] ] ] ] ] "idiomaDefecto" => "en" "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S0870255122005224?idApp=UINPBA00004E" "url" => "/08702551/unassign/S0870255122005224/v2_202212230519/en/main.assets" ] "en" => array:19 [ "idiomaDefecto" => true "cabecera" => "<span class="elsevierStyleTextfn">Review Article</span>" "titulo" => "Chronic thromboembolic pulmonary hypertension: A comprehensive review of pathogenesis, diagnosis, and treatment strategies" "tieneTextoCompleto" => true "autores" => array:1 [ 0 => array:4 [ "autoresLista" => "Daniel Inácio Cazeiro, Miguel Azaredo Raposo, Tatiana Guimarães, Nuno Lousada, David Jenkins, João R. Inácio, Susana Moreira, Ana Mineiro, Céline Freitas, Susana Martins, Ricardo Ferreira, Rita Luís, Nuno Cardim, Fausto J. Pinto, Rui Plácido" "autores" => array:15 [ 0 => array:3 [ "nombre" => "Daniel" "apellidos" => "Inácio Cazeiro" "referencia" => array:2 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">a</span>" "identificador" => "aff0005" ] 1 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">1</span>" "identificador" => "fn0005" ] ] ] 1 => array:3 [ "nombre" => "Miguel" "apellidos" => "Azaredo Raposo" "referencia" => array:2 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">a</span>" "identificador" => "aff0005" ] 1 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">1</span>" "identificador" => "fn0005" ] ] ] 2 => array:3 [ "nombre" => "Tatiana" "apellidos" => "Guimarães" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">a</span>" "identificador" => "aff0005" ] ] ] 3 => array:3 [ "nombre" => "Nuno" "apellidos" => "Lousada" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">a</span>" "identificador" => "aff0005" ] ] ] 4 => array:3 [ "nombre" => "David" "apellidos" => "Jenkins" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">c</span>" "identificador" => "aff0015" ] ] ] 5 => array:3 [ "nombre" => "João" "apellidos" => "R. Inácio" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">d</span>" "identificador" => "aff0020" ] ] ] 6 => array:3 [ "nombre" => "Susana" "apellidos" => "Moreira" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">e</span>" "identificador" => "aff0025" ] ] ] 7 => array:3 [ "nombre" => "Ana" "apellidos" => "Mineiro" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">e</span>" "identificador" => "aff0025" ] ] ] 8 => array:3 [ "nombre" => "Céline" "apellidos" => "Freitas" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">f</span>" "identificador" => "aff0030" ] ] ] 9 => array:3 [ "nombre" => "Susana" "apellidos" => "Martins" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">a</span>" "identificador" => "aff0005" ] ] ] 10 => array:3 [ "nombre" => "Ricardo" "apellidos" => "Ferreira" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">g</span>" "identificador" => "aff0035" ] ] ] 11 => array:3 [ "nombre" => "Rita" "apellidos" => "Luís" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">h</span>" "identificador" => "aff0040" ] ] ] 12 => array:3 [ "nombre" => "Nuno" "apellidos" => "Cardim" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">b</span>" "identificador" => "aff0010" ] ] ] 13 => array:3 [ "nombre" => "Fausto J." "apellidos" => "Pinto" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">a</span>" "identificador" => "aff0005" ] ] ] 14 => array:4 [ "nombre" => "Rui" "apellidos" => "Plácido" "email" => array:1 [ 0 => "placidorui@gmail.com" ] "referencia" => array:4 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">a</span>" "identificador" => "aff0005" ] 1 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">b</span>" "identificador" => "aff0010" ] 2 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">1</span>" "identificador" => "fn0005" ] 3 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">*</span>" "identificador" => "cor0005" ] ] ] ] "afiliaciones" => array:8 [ 0 => array:3 [ "entidad" => "Cardiology Department, Centro Hospitalar Universitário Lisboa Norte, CAML, CCUL, Faculty of Medicine, Lisbon, Portugal" "etiqueta" => "a" "identificador" => "aff0005" ] 1 => array:3 [ "entidad" => "Cardiology Department, CUF Descobertas Hospital, Lisbon, Portugal" "etiqueta" => "b" "identificador" => "aff0010" ] 2 => array:3 [ "entidad" => "Cardiothoracic Surgery Department, Royal Papworth Hospital, Cambridge, UK" "etiqueta" => "c" "identificador" => "aff0015" ] 3 => array:3 [ "entidad" => "Radiology Department, Centro Hospitalar Universitário Lisboa Norte, Lisbon, Portugal" "etiqueta" => "d" "identificador" => "aff0020" ] 4 => array:3 [ "entidad" => "Pulmonology Department, Centro Hospitalar Universitário Lisboa Norte, Lisbon, Portugal" "etiqueta" => "e" "identificador" => "aff0025" ] 5 => array:3 [ "entidad" => "Association for Research and Development of Faculty of Medicine (AIDFM), Cardiovascular Research Support Unit (GAIC), Lisbon, Portugal" "etiqueta" => "f" "identificador" => "aff0030" ] 6 => array:3 [ "entidad" => "Cardiothoracic Surgery Department, Centro Hospitalar Universitário Lisboa Norte, CAML, CCUL, Faculty of Medicine, Lisbon, Portugal" "etiqueta" => "g" "identificador" => "aff0035" ] 7 => array:3 [ "entidad" => "Pathology Department, Centro Hospitalar Universitário Lisboa Central, Lisbon, Portugal" "etiqueta" => "h" "identificador" => "aff0040" ] ] "correspondencia" => array:1 [ 0 => array:3 [ "identificador" => "cor0005" "etiqueta" => "⁎" "correspondencia" => "Corresponding author." ] ] ] ] "titulosAlternativos" => array:1 [ "pt" => array:1 [ "titulo" => "Hipertensão pulmonar tromboembólica crónica: revisão da patogénese, diagnóstico e estratégias terapêuticas" ] ] "resumenGrafico" => array:2 [ "original" => 0 "multimedia" => array:7 [ "identificador" => "fig0030" "etiqueta" => "Figure 6" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr6.jpeg" "Alto" => 4255 "Ancho" => 3417 "Tamanyo" => 581133 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">Diagnostic algorithm in patients with suspected chronic thromboembolic pulmonary disease/hypertension. CO: cardiac output; CTEPD: chronic thromboembolic pulmonary disease; CTEPH: chronic thromboembolic pulmonary hypertension; CPET: cardiopulmonary exercise test; CTPA: computed tomography pulmonary angiography; DECT: dual-energy computed tomography; DSA: digital subtraction angiography; mPAP: mean pulmonary artery pressure; MRI: magnetic resonance imaging; N: no; PAH: pulmonary arterial hypertension; PASP: pulmonary artery systolic pressure; PE: pulmonary embolism; PETCO<span class="elsevierStyleInf">2</span>: end-tidal partial pressure of carbon dioxide; RHC: right heart catheterization; SPECT: single-photon emission computed tomography; V/Q: ventilation/perfusion; VE/VCO<span class="elsevierStyleInf">2</span>: ventilatory equivalent for carbon dioxide; VO<span class="elsevierStyleInf">2</span>/HR: oxygen pulse; VO<span class="elsevierStyleInf">2</span>: oxygen uptake; Y: yes.</p> <p id="spar0050" class="elsevierStyleSimplePara elsevierViewall"><span class="elsevierStyleSup">a</span>Could also be considered in rapidly deteriorating patients.</p> <p id="spar0055" class="elsevierStyleSimplePara elsevierViewall"><span class="elsevierStyleSup">b</span>Follow-up echocardiogram could be considered if symptoms persist.</p> <p id="spar0060" class="elsevierStyleSimplePara elsevierViewall"><span class="elsevierStyleSup">c</span>SPECT V/Q, DECT or MRI perfusion.</p> <p id="spar0065" class="elsevierStyleSimplePara elsevierViewall"><span class="elsevierStyleSup">d</span>Low PETCO<span class="elsevierStyleInf">2</span>, high VE/VCO<span class="elsevierStyleInf">2</span>, low VO<span class="elsevierStyleInf">2</span>/HR and low peak VO<span class="elsevierStyleInf">2</span> on CPET or mPAP/CO slope between rest and exercise >3 mmHg/l/min on RHC.</p> <p id="spar0135" class="elsevierStyleSimplePara elsevierViewall">Created with BioRender.com.</p>" ] ] ] "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Introduction</span><p id="par0005" class="elsevierStylePara elsevierViewall">Chronic thromboembolic pulmonary hypertension (CTEPH) is in group 4 of the pulmonary hypertension (PH) clinical classification, alongside other forms of vascular obstruction.<a class="elsevierStyleCrossRefs" href="#bib0505"><span class="elsevierStyleSup">1,2</span></a> This life-threatening condition is defined by the presence of a precapillary hemodynamic phenotype resulting from incomplete resolution and fibrotic transformation of thromboembolic deposits in the pulmonary arteries after at least three months of effective anticoagulation. In the absence of PH at rest, the term ‘chronic thromboembolic pulmonary disease (CTEPD) is preferred.<a class="elsevierStyleCrossRef" href="#bib0515"><span class="elsevierStyleSup">3</span></a> Although previously thought to be a direct result of persistent intravascular obstruction from chronic blood clots after acute pulmonary embolism (PE), there is growing evidence that the pathophysiology of CTEPH is more complex, with concomitant small-vessel remodeling in both obstructed and non-obstructed territories,<a class="elsevierStyleCrossRefs" href="#bib0520"><span class="elsevierStyleSup">4,5</span></a> indicating a multicompartmental disease that can involve the proximal (lobar-to-segmental) and distal (subsegmental) pulmonary arteries with obstructive chronic fibrothrombotic material, and the precapillary bed (microvasculature), with a non-thrombotic vasculopathy as in pulmonary arterial hypertension (PAH). Combined data from advanced imaging and hemodynamics can distinguish proximal from distal obstructive disease and establish the degree of microvasculopathy.</p><p id="par0010" class="elsevierStylePara elsevierViewall">Patients often present with non-specific symptoms reflecting systemic congestion and low cardiac output (CO). Recent guidelines<a class="elsevierStyleCrossRef" href="#bib0510"><span class="elsevierStyleSup">2</span></a> recommend systematic follow-up assessment of residual symptoms after acute PE and provide information on anatomical and functional imaging manifestations of chronic disease that support a diagnosis of CTEPD /CTEPH. Appropriate integration of the clinical context is mandatory, since numerous conditions such as malignancies, splenectomy, implanted devices, inflammatory diseases, antiphospholipid syndrome, and thyroid hormone replacement therapy are known risk factors for the development of CTEPH.</p><p id="par0015" class="elsevierStylePara elsevierViewall">All treatment decisions should be made in the context of a multidisciplinary CTEPH team. The aim of this article, which takes recent advances into account, is to provide a comprehensive and up-to-date review of CTEPH, mainly focusing on its pathogenesis, diagnostic approach, and treatment strategies in all the compartments of the disease.</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0030">Epidemiology</span><p id="par0020" class="elsevierStylePara elsevierViewall">CTEPH is classically considered a consequence of acute PE. Some studies report that 50–75% of patients have a previous history of PE.<a class="elsevierStyleCrossRefs" href="#bib0530"><span class="elsevierStyleSup">6–8</span></a> Persistent perfusion defects are present in about 30–50% of patients after acute PE,<a class="elsevierStyleCrossRefs" href="#bib0545"><span class="elsevierStyleSup">9,10</span></a> although fewer will present with CTEPH symptoms.<a class="elsevierStyleCrossRef" href="#bib0545"><span class="elsevierStyleSup">9</span></a> However, the true incidence of CTEPH has not been clearly established. A meta-analysis of 16 studies<a class="elsevierStyleCrossRef" href="#bib0555"><span class="elsevierStyleSup">11</span></a> reported figures ranging from 0.4% to 6.2%, with an overall weighted pooled incidence of 2.3%. In the four studies that focused on consecutive survivors after three months of anticoagulation, the pooled incidence was 3.2%. When analyzing all-comers studies (i.e. all consecutive patients with symptomatic pulmonary embolism and no exclusion criteria), the incidence was found to be only 0.56%, a number that probably best reflects the incidence of CTEPH on a population level, in the authors’ opinion.<a class="elsevierStyleCrossRef" href="#bib0555"><span class="elsevierStyleSup">11</span></a> Other national registries have also reported a lower incidence compared with the pooled analysis.<a class="elsevierStyleCrossRefs" href="#bib0560"><span class="elsevierStyleSup">12,13</span></a></p><p id="par0025" class="elsevierStylePara elsevierViewall">In fact, the reported incidence of CTEPH may be overestimated. In the aforementioned studies, the CTEPH diagnosis was established only a few months after pulmonary embolism (PE), in contrast to what is generally seen. It is therefore possible that the reported incidences were a mix of incident and prevalent cases, due to patients having pre-existing, undiagnosed CTEPH. In one of these studies,<a class="elsevierStyleCrossRef" href="#bib0570"><span class="elsevierStyleSup">14</span></a> of the seven CTEPH diagnoses confirmed by right heart catheterization (RHC), five patients presented with markedly elevated pulmonary artery (PA) systolic pressure (PASP) (62–102 mmHg) at the time of the index PE. This would not be compatible with a first PE, because a non-adapted right ventricle could not generate such high pressures. After reviewing the initial computed tomography (CT) pulmonary angiography (CTPA), radiologists confirmed the presence of CTEPH signs in these five patients, which changed the cumulative incidence from 4.8% to 1.5%. Conversely, CTEPH may also be underdiagnosed because of its non-specific presentation, variable rates of previous PE, the expertise required to read CTPA exams, and the infrequent use of ventilation/perfusion (V/Q) scans.<a class="elsevierStyleCrossRefs" href="#bib0575"><span class="elsevierStyleSup">15,16</span></a> A recent review article<a class="elsevierStyleCrossRef" href="#bib0585"><span class="elsevierStyleSup">17</span></a> stated that in the US, even on a conservative estimate, around 1500–3000 cases of CTEPH should be diagnosed each year; however, considerably fewer cases are observed, with only 0.9 PEA procedures performed annually per million adults.<a class="elsevierStyleCrossRef" href="#bib0590"><span class="elsevierStyleSup">18</span></a></p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Risk factors</span><p id="par0030" class="elsevierStylePara elsevierViewall">After an episode of acute PE, significant resolution of thrombus occurs in the majority of patients who are treated with anticoagulation.<a class="elsevierStyleCrossRefs" href="#bib0520"><span class="elsevierStyleSup">4,5</span></a> However, for poorly understood reasons, a small minority will continue to have organized residual clots in the pulmonary vessel walls and will subsequently develop CTEPH.<a class="elsevierStyleCrossRefs" href="#bib0520"><span class="elsevierStyleSup">4,5</span></a></p><p id="par0035" class="elsevierStylePara elsevierViewall">Several clinical conditions may increase the risk for developing CTEPH after an acute PE (<a class="elsevierStyleCrossRef" href="#fig0005">Figure 1</a>). Previous history of PE, larger perfusion defects, idiopathic etiology and younger age at PE diagnosis seem to increase the risk of CTEPH, as shown in a prospective study with consecutive patients after acute PE.<a class="elsevierStyleCrossRef" href="#bib0595"><span class="elsevierStyleSup">19</span></a> In a score developed for prediction of CTEPH, development of symptoms >14 days before PE diagnosis, right ventricular (RV) dysfunction at the time of presentation, and idiopathic PE were all independent predictors for CTEPH.<a class="elsevierStyleCrossRef" href="#bib0600"><span class="elsevierStyleSup">20</span></a></p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0040" class="elsevierStylePara elsevierViewall">Thrombophilic disorders increase the risk for PE. It therefore seems logical that conditions which predispose to a hypercoagulable state would lead to a higher risk of CTEPH. However, classical inherited thrombophilias such as antithrombin deficiency, protein C/S deficiency and factor II or V mutations are not associated with CTEPH.<a class="elsevierStyleCrossRef" href="#bib0605"><span class="elsevierStyleSup">21</span></a> By contrast, antiphospholipid antibodies have been identified in 20% of CTEPH patients, and in higher titers than in idiopathic PAH patients, underlining its role in the pathogenesis of CTEPH.<a class="elsevierStyleCrossRef" href="#bib0605"><span class="elsevierStyleSup">21</span></a> Other elevated prothrombotic factors have been identified in CTEPH patients, including factor VIII and von Willebrand factor.<a class="elsevierStyleCrossRefs" href="#bib0610"><span class="elsevierStyleSup">22,23</span></a> Fibrinogen polymorphisms have also been reported in some CTEPH patients.<a class="elsevierStyleCrossRefs" href="#bib0620"><span class="elsevierStyleSup">24–26</span></a></p><p id="par0045" class="elsevierStylePara elsevierViewall">A case–control study comparing consecutive CTEPH patients with patients after acute PE identified splenectomy, ventriculoatrial shunts, and chronic inflammatory disorders such as inflammatory bowel disease and chronic osteomyelitis as risk factors for CTEPH.<a class="elsevierStyleCrossRef" href="#bib0635"><span class="elsevierStyleSup">27</span></a> This was later reinforced by a retrospective study comparing CTEPH patients with non-thrombotic PH patients, which identified other risk factors such as infected pacemaker leads, non-O blood group, antiphospholipid antibodies, thyroid replacement therapy and history of malignancy.<a class="elsevierStyleCrossRef" href="#bib0640"><span class="elsevierStyleSup">28</span></a> More recently, Jevnikar et al. demonstrated an association between totally implantable central venous access systems and CTEPH.<a class="elsevierStyleCrossRef" href="#bib0645"><span class="elsevierStyleSup">29</span></a> Although the evidence was deemed insufficient to consider it as a risk factor, the authors speculated that the higher risk of catheter-related thrombosis, infection and inflammation might indirectly increase the risk for CTEPH.<a class="elsevierStyleCrossRef" href="#bib0645"><span class="elsevierStyleSup">29</span></a></p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">Pathophysiology</span><p id="par0050" class="elsevierStylePara elsevierViewall">The pathophysiology of CTEPH is complex and not fully understood. While initially thought to be solely a consequence of persistent obstruction of the PA, involvement of small vessels similar to that observed in idiopathic PAH may be present in some patients.<a class="elsevierStyleCrossRefs" href="#bib0520"><span class="elsevierStyleSup">4,5</span></a> There are therefore two types of vascular lesions which contribute to increased pulmonary vascular resistance (PVR): persistent intravascular obstruction of the PA by organized fibrotic clots, and secondary microvasculopathy<a class="elsevierStyleCrossRefs" href="#bib0515"><span class="elsevierStyleSup">3,4</span></a> (<a class="elsevierStyleCrossRef" href="#fig0010">Figure 2</a>).</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia><p id="par0055" class="elsevierStylePara elsevierViewall">Intravascular obstruction can involve all segments of the PA, from the main arteries down to distal branches at the intra-acinar level.<a class="elsevierStyleCrossRefs" href="#bib0515"><span class="elsevierStyleSup">3,4</span></a> At the proximal level, PA obstructions are recanalized, fibrotic, organized clots, which remain adherent to the vessel wall and correspond to slits, webs, stenosis or pouching on vascular imaging<a class="elsevierStyleCrossRefs" href="#bib0515"><span class="elsevierStyleSup">3,4</span></a> (<a class="elsevierStyleCrossRef" href="#fig0015">Figure 3</a>). These collagen-rich clots cannot easily be detached from the vessel walls, in contrast to what is seen with fresh clots in acute PE<a class="elsevierStyleCrossRef" href="#bib0520"><span class="elsevierStyleSup">4</span></a> (<a class="elsevierStyleCrossRef" href="#fig0010">Figure 2</a>a). Longstanding exposure to elevated pulmonary artery pressure (PAP) will also contribute to the formation of atheromatous lesions in the pulmonary vessels, with consequent increased wall stiffness.<a class="elsevierStyleCrossRefs" href="#bib0515"><span class="elsevierStyleSup">3,4,30</span></a> Distally, chronic obstruction of small pulmonary vessels is typically seen as partially recanalized lesions, with multiple lumina (colander-like lesions)<a class="elsevierStyleCrossRefs" href="#bib0515"><span class="elsevierStyleSup">3,4</span></a> (<a class="elsevierStyleCrossRef" href="#fig0020">Figure 4</a>).</p><elsevierMultimedia ident="fig0015"></elsevierMultimedia><elsevierMultimedia ident="fig0020"></elsevierMultimedia><p id="par0060" class="elsevierStylePara elsevierViewall">Microvasculopathy lesions were described in CTEPH patients by Moser and Bloor, through histopathological examination of lung tissue.<a class="elsevierStyleCrossRef" href="#bib0655"><span class="elsevierStyleSup">31</span></a> The authors depicted intimal remodeling, with eccentric fibrosis and fibromuscular proliferation, as well as plexiform lesions, all of which are also present in idiopathic PAH (<a class="elsevierStyleCrossRefs" href="#fig0010">Figures 2c and 4</a>). These lesions seem to predominate in non-obstructed pulmonary vessels; it was accordingly proposed that pulmonary blood flow would shift from obstructed arteries to non-obstructed territories, leading to higher local pressures, increased wall stress and vascular remodeling.<a class="elsevierStyleCrossRefs" href="#bib0655"><span class="elsevierStyleSup">31,32</span></a> Interestingly, this mechanism appears to partially explain not only the discrepancy between perfusion defects and PVR, but also the development of CTEPH in PE patients who are adequately anticoagulated and show no signs of recurrence.<a class="elsevierStyleCrossRef" href="#bib0505"><span class="elsevierStyleSup">1</span></a> However, the same mechanism does not explain the presence of microvasculopathy lesions in territories located distally to obstructed pulmonary vessels, as noted by Moser and Bloor.<a class="elsevierStyleCrossRef" href="#bib0655"><span class="elsevierStyleSup">31</span></a> In these territories, remodeling of precapillary arterioles, as well as of capillaries and post-capillary venules (resembling hemangiomatosis and veno-occlusive disease, respectively), was later described<a class="elsevierStyleCrossRefs" href="#bib0660"><span class="elsevierStyleSup">32,33</span></a> (<a class="elsevierStyleCrossRef" href="#fig0020">Figure 4</a>). Bronchial artery and vasa vasorum anastomoses with pulmonary vessels distal to the obstructed artery may play a major role in the development of microvasculopathy: although they are necessary to prevent lung ischemia in the affected territories, pulmonary vessels become exposed to high systemic circulation pressures, increasing wall stress and vascular remodeling.<a class="elsevierStyleCrossRef" href="#bib0665"><span class="elsevierStyleSup">33</span></a> Bronchopulmonary shunting may also be observed when anastomoses develop with the post-capillary territory.<a class="elsevierStyleCrossRef" href="#bib0665"><span class="elsevierStyleSup">33</span></a> The presence of microvasculopathy in both obstructed and non-obstructed areas may explain the development of persistent PH after treatment of obstructive lesions.<a class="elsevierStyleCrossRef" href="#bib0505"><span class="elsevierStyleSup">1</span></a></p><p id="par0065" class="elsevierStylePara elsevierViewall">Endothelial dysfunction also appears to play a central role in the development of microvasculopathy. Similarly to PAH, some pathways may be dysregulated in CTEPH and are being targeted with PAH-specific drugs:<ul class="elsevierStyleList" id="lis0005"><li class="elsevierStyleListItem" id="lsti0005"><span class="elsevierStyleLabel">•</span><p id="par0070" class="elsevierStylePara elsevierViewall">Nitric oxide (NO) is secreted by endothelial cells through the action of nitric oxide synthases (NOS). It inhibits platelet aggregation and stimulates soluble guanylate cyclase (sGC) to produce cyclic guanosine monophosphate (cGMP).<a class="elsevierStyleCrossRef" href="#bib0670"><span class="elsevierStyleSup">34</span></a> This substance, through activation of a cGMP-dependent kinase, mediates vasodilatory and antiproliferative effects on vascular smooth muscle cells.<a class="elsevierStyleCrossRef" href="#bib0670"><span class="elsevierStyleSup">34</span></a> In CTEPH patients, NO levels appear to be reduced.<a class="elsevierStyleCrossRef" href="#bib0675"><span class="elsevierStyleSup">35</span></a> Additionally, levels of asymmetric dimethylarginine, an NOS inhibitor, are increased and correlate with severity of pulmonary vascular disease and its outcomes.<a class="elsevierStyleCrossRef" href="#bib0680"><span class="elsevierStyleSup">36</span></a> The importance of NO-sGC-cGMP pathway dysregulation in the pathogenesis of CTEPH is further demonstrated by the results of the CHEST-1 and CHEST-2 trials, in which riociguat, an sGC stimulator, improved patients’ functional capacity and pulmonary vascular resistance.<a class="elsevierStyleCrossRefs" href="#bib0685"><span class="elsevierStyleSup">37,38</span></a></p></li><li class="elsevierStyleListItem" id="lsti0010"><span class="elsevierStyleLabel">•</span><p id="par0075" class="elsevierStylePara elsevierViewall">Endothelial cells also produce prostacyclin (PGI<span class="elsevierStyleInf">2</span>), which has vasodilatory, antiplatelet, antiproliferative and immunomodulatory properties. PGI<span class="elsevierStyleInf">2</span> levels are decreased in patients with PAH.<a class="elsevierStyleCrossRef" href="#bib0695"><span class="elsevierStyleSup">39</span></a> Subcutaneous treprostinil, a synthetic prostacyclin analog, is approved in the European Union for inoperable or persistent/recurrent CTEPH, after demonstration of its safety and improvement in functional capacity.<a class="elsevierStyleCrossRef" href="#bib0700"><span class="elsevierStyleSup">40</span></a></p></li><li class="elsevierStyleListItem" id="lsti0015"><span class="elsevierStyleLabel">•</span><p id="par0080" class="elsevierStylePara elsevierViewall">Levels of endothelin (ET)-1, a vasoconstrictor and pro-proliferative substance produced by endothelial cells, are also elevated in patients with CTEPH and correlate with disease severity.<a class="elsevierStyleCrossRef" href="#bib0705"><span class="elsevierStyleSup">41</span></a> ET-1 levels may be useful for preoperative identification of patients at risk for persistent PH after PEA.<a class="elsevierStyleCrossRef" href="#bib0705"><span class="elsevierStyleSup">41</span></a> The endothelin receptor antagonist macitentan has shown some promising results regarding PVR improvement in a phase 2 trial.<a class="elsevierStyleCrossRef" href="#bib0710"><span class="elsevierStyleSup">42</span></a> However, the phase 3 MACiTEPH study to evaluate the efficacy and safety of macitentan 75 mg in inoperable or persistent/recurrent CTEPH was interrupted due to futility (ClinicalTrials.gov identifier: <a href="ctgov:NCT04271475">NCT04271475</a>).</p></li></ul></p><p id="par0085" class="elsevierStylePara elsevierViewall">Initially, increases in PVR lead to increased RV afterload and adaptive, concentric hypertrophy, which results in decreased wall stress and increased pumping effectiveness.<a class="elsevierStyleCrossRefs" href="#bib0525"><span class="elsevierStyleSup">5,43</span></a> Over time, continuous exposure to progressively higher PVR leads to maladaptive RV remodeling, with eccentric remodeling, RV dilatation, diastolic dysfunction, and fibrosis.<a class="elsevierStyleCrossRefs" href="#bib0525"><span class="elsevierStyleSup">5,43</span></a> Consequently, increased wall tension develops and leads to increased oxygen consumption, further worsening RV function. Decreased RV stroke volume leads to low systemic CO, with worsening of RV perfusion, and eventually worsening RV dysfunction culminates in RV failure.<a class="elsevierStyleCrossRefs" href="#bib0525"><span class="elsevierStyleSup">5,43</span></a></p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Diagnosis</span><p id="par0090" class="elsevierStylePara elsevierViewall">Since treatment of CTEPH is potentially curative, physicians should have a high level of suspicion in every patient who develops symptoms after a PE episode.<a class="elsevierStyleCrossRef" href="#bib0510"><span class="elsevierStyleSup">2</span></a> Signs and symptoms are non-specific and may be present in other PH etiologies and cardiovascular or pulmonary conditions.<a class="elsevierStyleCrossRef" href="#bib0510"><span class="elsevierStyleSup">2</span></a> Dyspnea on exertion, exercise intolerance, hemoptysis (possibly due to bronchial artery hypertrophy) and manifestations of RV failure such as lower limb edema, abdominal distention, lightheadedness or syncope may be present.<a class="elsevierStyleCrossRefs" href="#bib0510"><span class="elsevierStyleSup">2,17</span></a> In more advanced cases, symptoms may occur due to compression of adjacent structures secondary to pulmonary artery dilatation (thoracic compression syndrome).<a class="elsevierStyleCrossRef" href="#bib0510"><span class="elsevierStyleSup">2</span></a> Examples include exertional chest pain or even acute coronary syndromes due to extrinsic compression of the left main coronary artery,<a class="elsevierStyleCrossRefs" href="#bib0720"><span class="elsevierStyleSup">44,45</span></a> Ortner's syndrome due to recurrent laryngeal nerve compression, and respiratory infections or atelectasis due to compression of the bronchi.<a class="elsevierStyleCrossRef" href="#bib0730"><span class="elsevierStyleSup">46</span></a> In CTEPD without PH at rest, symptoms may be attributable to exercise-induced PH and/or increased dead space ventilation.<a class="elsevierStyleCrossRef" href="#bib0510"><span class="elsevierStyleSup">2</span></a></p><p id="par0095" class="elsevierStylePara elsevierViewall">CTEPH should also be suspected at the time of acute PE when CTPA shows findings suggestive of chronic fibrothrombotic deposits – bands, webs, arterial narrowing or retraction, and/or dilated bronchial arteries (<a class="elsevierStyleCrossRef" href="#fig0025">Figure 5</a>) – or when the echocardiogram depicts an estimated PASP >60 mmHg and/or features of RV dysfunction and hypertrophy.<a class="elsevierStyleCrossRef" href="#bib0570"><span class="elsevierStyleSup">14</span></a> In asymptomatic patients with risk factors (<a class="elsevierStyleCrossRef" href="#fig0005">Figure 1</a>) or a high CTEPH prediction score (<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>),<a class="elsevierStyleCrossRef" href="#bib0600"><span class="elsevierStyleSup">20</span></a> diagnostic assessment should also be considered.<a class="elsevierStyleCrossRef" href="#bib0510"><span class="elsevierStyleSup">2</span></a> A proposed diagnostic algorithm is shown in <a class="elsevierStyleCrossRef" href="#fig0030">Figure 6</a>. Initial assessment of patients with suspected CTEPH should include a transthoracic echocardiogram to determine the probability of PH (<a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a>) and a V/Q scan to look for mismatch perfusion defects.<a class="elsevierStyleCrossRef" href="#bib0510"><span class="elsevierStyleSup">2</span></a> In general, especially considering that CTPA performed by chest radiologists is not widely accessible, a V/Q scan remains the gold standard exam for exclusion of CTEPD without PH at rest, due to its high sensitivity (96.2–97.4%) and negative predictive value of almost 100%<a class="elsevierStyleCrossRefs" href="#bib0735"><span class="elsevierStyleSup">47,48</span></a> (<a class="elsevierStyleCrossRef" href="#fig0035">Figure 7</a>). Other perfusion techniques, such as dual-energy CT scan or magnetic resonance perfusion, may be superior to a V/Q scan (<a class="elsevierStyleCrossRef" href="#fig0040">Figure 8</a>). However, these are more technically challenging and expensive, have limited availability, and lack multicenter validation.<a class="elsevierStyleCrossRef" href="#bib0515"><span class="elsevierStyleSup">3</span></a></p><elsevierMultimedia ident="fig0025"></elsevierMultimedia><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><elsevierMultimedia ident="fig0030"></elsevierMultimedia><elsevierMultimedia ident="tbl0010"></elsevierMultimedia><elsevierMultimedia ident="fig0035"></elsevierMultimedia><elsevierMultimedia ident="fig0040"></elsevierMultimedia><p id="par0100" class="elsevierStylePara elsevierViewall">The presence of intermediate or high echocardiographic probability of PH and mismatch perfusion defects on imaging should prompt referral to a PH center for further assessment. In patients with perfusion defects but low echocardiographic probability of PH, additional exercise testing may be useful to detect patients with CTEPD without PH at rest, such as cardiopulmonary exercise testing (CPET) or exercise RHC,<a class="elsevierStyleCrossRef" href="#bib0510"><span class="elsevierStyleSup">2</span></a> or a combination of the two to maximize the available information. Typical CPET findings include low end-tidal partial pressure of carbon dioxide (PETCO<span class="elsevierStyleInf">2</span>), high ventilatory equivalent for carbon dioxide (VE/VCO<span class="elsevierStyleInf">2</span>), low oxygen pulse (VO<span class="elsevierStyleInf">2</span>/HR), and low peak oxygen uptake (VO<span class="elsevierStyleInf">2</span>).<a class="elsevierStyleCrossRef" href="#bib0510"><span class="elsevierStyleSup">2</span></a> Regarding exercise RHC, a mean PAP (mPAP)/CO slope >3 mmHg/l/min while the pulmonary artery wedge pressure/CO slope remains <2 mmHg/l/min reflects pulmonary vascular disease.<a class="elsevierStyleCrossRef" href="#bib0510"><span class="elsevierStyleSup">2</span></a> Patients with such findings should also be assessed in a PH center.</p><p id="par0105" class="elsevierStylePara elsevierViewall">CTPA is currently used to confirm the presence of CTEPD and to assess operability, providing detailed information on endovascular thrombi, vascular wall thickness, and the presence of bands/webs, stenosis and bronchial artery collateral circulation<a class="elsevierStyleCrossRefs" href="#bib0510"><span class="elsevierStyleSup">2,48</span></a> (<a class="elsevierStyleCrossRef" href="#fig0025">Figure 5</a>). CTPA also enables differential diagnosis of PH, as it can detect underlying parenchymal lung or mediastinal disease and other causes of vascular occlusion (PA sarcoma, arteritis, in-situ thrombosis or congenital anomalies).<a class="elsevierStyleCrossRef" href="#bib0740"><span class="elsevierStyleSup">48</span></a> Technological advances have improved the diagnostic performance of this exam. A recent meta-analysis of 10 studies demonstrated high sensitivity (98%) and specificity (99%) for CTPA in the detection of CTEPD on a vessel-based analysis.<a class="elsevierStyleCrossRef" href="#bib0745"><span class="elsevierStyleSup">49</span></a> However, these exams were assessed by expert chest radiologists, and CTPA still has lower sensitivity for detecting CTEPD in segmental and subsegmental vessels.<a class="elsevierStyleCrossRef" href="#bib0740"><span class="elsevierStyleSup">48</span></a> Therefore, a negative CTPA does not exclude CTEPD, and digital subtraction angiography may be necessary to fully assess treatment options.<a class="elsevierStyleCrossRef" href="#bib0510"><span class="elsevierStyleSup">2</span></a> Novel techniques such as cone-beam CT and area-detector CT are being increasingly used, as they provide better visualization of segmental and subsegmental disease and are useful for guidance of BPA therapy,<a class="elsevierStyleCrossRefs" href="#bib0750"><span class="elsevierStyleSup">50–52</span></a> but they still require validation in prospective trials.<a class="elsevierStyleCrossRef" href="#bib0510"><span class="elsevierStyleSup">2</span></a></p><p id="par0110" class="elsevierStylePara elsevierViewall">Diagnosis of CTEPH requires confirmation of precapillary PH through RHC, defined by mPAP >20 mmHg, pulmonary capillary wedge pressure (PCWP) ≤15 mmHg and PVR >2 Wood units.<a class="elsevierStyleCrossRef" href="#bib0510"><span class="elsevierStyleSup">2</span></a> It is important to emphasize that PCWP may not always be reliable in CTEPH, due to occlusion of PA branches and consequent difficulty in wedging the Swan-Ganz catheter balloon tip. In such cases, measurement of left ventricular end-diastolic pressure is warranted.<a class="elsevierStyleCrossRef" href="#bib0510"><span class="elsevierStyleSup">2</span></a> The pulmonary artery occlusion technique may also be used to partition PVR into larger arterial and small arterial plus venous components, but this has not been generally considered a part of hemodynamic assessment.<a class="elsevierStyleCrossRef" href="#bib0505"><span class="elsevierStyleSup">1</span></a> Because there are no direct imaging methods to quantify microvasculopathy, it is nowadays subjectively assessed by correlation of perfusion defects with hemodynamic parameters, despite its lack of accuracy.<a class="elsevierStyleCrossRef" href="#bib0505"><span class="elsevierStyleSup">1</span></a></p><p id="par0115" class="elsevierStylePara elsevierViewall">When symptoms are clearly attributable to obstruction of intravascular pulmonary arteries but there is no PH at rest, such patients may be considered to have exercise-induced PH, which is defined by mPAP/CO slope between rest and exercise >3 mmHg/l/min, assessed by exercise RHC.<a class="elsevierStyleCrossRef" href="#bib0510"><span class="elsevierStyleSup">2</span></a></p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Treatment</span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0055">Anticoagulation</span><p id="par0120" class="elsevierStylePara elsevierViewall">Lifelong anticoagulation is recommended in patients with CTEPH.<a class="elsevierStyleCrossRef" href="#bib0510"><span class="elsevierStyleSup">2</span></a> Although there have been few randomized clinical trials, vitamin K antagonists (VKAs) have been the most used drug class in this setting, with a target international normalized ratio of 2–3.<a class="elsevierStyleCrossRef" href="#bib0510"><span class="elsevierStyleSup">2</span></a> Direct oral anticoagulants (DOACs) are increasingly used; while some retrospective studies have indicated that DOACs may be more associated with the presence of acute or subacute thrombi at the time of PEA surgery or with a higher rate of venous thromboembolism recurrence, bleeding rates and survival appear to be similar to VKAs.<a class="elsevierStyleCrossRefs" href="#bib0765"><span class="elsevierStyleSup">53,54</span></a> Regarding CTEPD without PH at rest, the most recent guidelines recommend long-term anticoagulation based on individualized decision-making, as there is no evidence in favor or against.<a class="elsevierStyleCrossRef" href="#bib0510"><span class="elsevierStyleSup">2</span></a></p></span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0060">Mechanical treatment</span><p id="par0125" class="elsevierStylePara elsevierViewall">In view of the pathophysiology of CTEPH, two mechanical treatment options targeting fibrothrombotic vessel obstructions are available: PEA and BPA.<a class="elsevierStyleCrossRef" href="#bib0505"><span class="elsevierStyleSup">1</span></a></p><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0065">Pulmonary endarterectomy</span><p id="par0130" class="elsevierStylePara elsevierViewall">PEA is the recommended treatment in patients with operable CTEPH. Its main objective is to remove all macroscopic obstructive material in order to reduce PVR and improve V/Q mismatch.<a class="elsevierStyleCrossRef" href="#bib0505"><span class="elsevierStyleSup">1</span></a> PEA requires cardiopulmonary bypass and uses deep hypothermic circulatory arrest to reduce metabolic rate and protect vital organs during the absence of perfusion.<a class="elsevierStyleCrossRef" href="#bib0505"><span class="elsevierStyleSup">1</span></a> Cooling to 20<span class="elsevierStyleHsp" style=""></span>°C allows safe arrest periods of up to 20 min, which is usually enough for disease clearance on one side.<a class="elsevierStyleCrossRef" href="#bib0505"><span class="elsevierStyleSup">1</span></a></p><p id="par0135" class="elsevierStylePara elsevierViewall">Historically, PEA was associated with high inpatient mortality and morbidity, with the first reviews reporting mortality rates of 22%.<a class="elsevierStyleCrossRef" href="#bib0775"><span class="elsevierStyleSup">55</span></a> Fragata and Telles<a class="elsevierStyleCrossRef" href="#bib0780"><span class="elsevierStyleSup">56</span></a> published the initial experience with 19 PEA procedures performed at a single-center in Portugal, with a postoperative mortality rate reflecting the initial phase of the learning curve. However, this experience paved the way for future PEA practices in the country. As the surgical technique has been increasingly used, early (30-day) mortality has significantly improved, with high-volume centers reporting rates as low as 0.8%, according to a recent systematic review.<a class="elsevierStyleCrossRef" href="#bib0785"><span class="elsevierStyleSup">57</span></a> Mortality is inversely related to the number of PEA procedures performed, and some centers report lower mortality rates over the years with increasing numbers of procedures.<a class="elsevierStyleCrossRefs" href="#bib0785"><span class="elsevierStyleSup">57–60</span></a> PEA also significantly improves right heart and pulmonary vascular hemodynamics, functional capacity and mid- to long-term survival, with reported five- and 10-year rates of 50–89.2% and 62–86.1%, respectively.<a class="elsevierStyleCrossRef" href="#bib0785"><span class="elsevierStyleSup">57</span></a> One of the studies included in the aforementioned review also reported a 15-year survival of around 91% in patients with proximal disease, as compared with 29.6% in those with residual PH.<a class="elsevierStyleCrossRef" href="#bib0805"><span class="elsevierStyleSup">61</span></a> Patients with operable disease who do not undergo surgery have worse outcomes, with five-year survival of 53% (vs. 83% in the PEA group), according to an observational study.<a class="elsevierStyleCrossRef" href="#bib0810"><span class="elsevierStyleSup">62</span></a></p><p id="par0140" class="elsevierStylePara elsevierViewall">Operability should be assessed in expert CTEPH centers by a multidisciplinary team, including an experienced PEA surgeon and a chest radiologist.<a class="elsevierStyleCrossRef" href="#bib0510"><span class="elsevierStyleSup">2</span></a> Correlation between vascular disease on imaging and severity of PVR does not seem to be a reliable parameter to determine operability. Although a proportionate PVR may indicate absence of significant microvasculopathy, imaging tends to underestimate the extent of disease, since chronic thromboembolic material retracts the lumen of the artery and small caliber branches enlarge after PEA.<a class="elsevierStyleCrossRef" href="#bib0815"><span class="elsevierStyleSup">63</span></a> Therefore, there is no upper limit of PVR beyond which PEA is contraindicated.<a class="elsevierStyleCrossRef" href="#bib0815"><span class="elsevierStyleSup">63</span></a> In fact, even though patients with PVR values >12.5 Wood units present with higher mortality risk, they still benefit from PEA, as long as complete resection of thromboembolic material and significant postoperative PVR improvement are achieved.<a class="elsevierStyleCrossRefs" href="#bib0815"><span class="elsevierStyleSup">63,64</span></a></p><p id="par0145" class="elsevierStylePara elsevierViewall">Technical operability depends on the surgeon's experience and the anatomical location of the disease.<a class="elsevierStyleCrossRefs" href="#bib0510"><span class="elsevierStyleSup">2,48</span></a> The intraoperative classification of CTEPH, revised in 2016, is based on the most central component of the disease – level 0 (no surgical evidence of disease), level I (one of the main PAs) and IC (complete obstruction of one of the main PAs), level II (lobar branches), level III (segmental branches) and level IV (subsegmental branches).<a class="elsevierStyleCrossRef" href="#bib0825"><span class="elsevierStyleSup">65</span></a> Appropriately trained PEA surgeons should be able to operate on levels I, II and III (proximal); however, levels III (distal) and IV are more dependent on the surgeon's and center's experience.<a class="elsevierStyleCrossRef" href="#bib0740"><span class="elsevierStyleSup">48</span></a> Criteria defining the level of expertise have been proposed: surgical mortality <5% (level I); as for level I plus number of PEA procedures/year ≥50 (level II); and as for level II plus ability to operate on distal disease plus ability to provide PEA, BPA and medical therapy (level III).<a class="elsevierStyleCrossRef" href="#bib0830"><span class="elsevierStyleSup">66</span></a> Current recommendations also state that there should be one expert center performing PEA per 40–50 million population.<a class="elsevierStyleCrossRef" href="#bib0830"><span class="elsevierStyleSup">66</span></a> The rationale for this is that high-volume centers report lower levels of mortality and have more experience in operating on distal disease; therefore, operability assessment may be different than in low-volume centers, which report higher percentages of inoperable patients, possibly due to lower levels of expertise.<a class="elsevierStyleCrossRefs" href="#bib0535"><span class="elsevierStyleSup">7,48</span></a> In these cases, a second opinion may be necessary.</p><p id="par0150" class="elsevierStylePara elsevierViewall">Although all patients with technically operable disease should be offered PEA, some conditions or comorbidities may limit the benefit of surgery (such as in patients with malignancy and limited lifespan). Attempting to restore perfusion in patients with severe parenchymal lung disease and ventilation compromise may not improve symptoms and can increase the risk of respiratory failure.<a class="elsevierStyleCrossRef" href="#bib0825"><span class="elsevierStyleSup">65</span></a> Likewise, patients with left ventricular systolic dysfunction may not be able to cope with increased RV cardiac output after PEA.<a class="elsevierStyleCrossRef" href="#bib0825"><span class="elsevierStyleSup">65</span></a> Other conditions which increase operative risk, such as absence of history of PE or deep vein thrombosis, right heart failure, World Health Organization (WHO) functional class IV, inconsistency on imaging modalities, absence of lower lobe disease and higher diastolic PAP, should be considered by the multidisciplinary CTEPH team.<a class="elsevierStyleCrossRef" href="#bib0740"><span class="elsevierStyleSup">48</span></a> It is also important to emphasize that older age is not a contraindication for PEA, as there are studies demonstrating benefit in this group of patients.<a class="elsevierStyleCrossRefs" href="#bib0835"><span class="elsevierStyleSup">67,68</span></a></p><p id="par0155" class="elsevierStylePara elsevierViewall">Complications may arise in the postoperative period, such as persistent PH with difficulty in weaning from cardiopulmonary bypass, airway hemorrhage or reperfusion pulmonary edema.<a class="elsevierStyleCrossRef" href="#bib0815"><span class="elsevierStyleSup">63</span></a> The latter usually develops within 72 h of PEA and its management is generally supportive (oxygen, positive pressure ventilation and diuretics), with improvement in a few days.<a class="elsevierStyleCrossRef" href="#bib0505"><span class="elsevierStyleSup">1</span></a> In more severe cases, venovenous extracorporeal membrane oxygenation (ECMO) may be necessary as a bridge to recovery. In a single-center study, increasing ECMO utilization proved useful in patients with severe CTEPH (PVR >12.5 Wood units), with a significant decrease in mortality.<a class="elsevierStyleCrossRef" href="#bib0795"><span class="elsevierStyleSup">59</span></a></p><p id="par0160" class="elsevierStylePara elsevierViewall">Residual PH is frequent after PEA and is associated with worsened survival and quality of life.<a class="elsevierStyleCrossRef" href="#bib0785"><span class="elsevierStyleSup">57</span></a> Although there are no specific criteria to define residual PH, previous meta-analyses report incidences of 20–25%.<a class="elsevierStyleCrossRefs" href="#bib0785"><span class="elsevierStyleSup">57,69</span></a> Cannon et al. demonstrated that mPAP ≥38 mmHg and PVR ≥5.3 Wood units correlated with worse long-term survival, and mPAP ≥30 mmHg was associated with initiation of vasodilator drugs, presumably because of clinical worsening.<a class="elsevierStyleCrossRef" href="#bib0850"><span class="elsevierStyleSup">70</span></a> There are currently several treatment options for residual PH, including redo PEA, which may be considered when proximal disease remains substantial.<a class="elsevierStyleCrossRef" href="#bib0855"><span class="elsevierStyleSup">71</span></a> These options should always be discussed in a multidisciplinary team, particularly when there is segmental and/or subsegmental disease.<a class="elsevierStyleCrossRef" href="#bib0505"><span class="elsevierStyleSup">1</span></a> Mortality in patients with residual PH is substantially higher, with reported figures ranging from 7.7% to 40%.<a class="elsevierStyleCrossRef" href="#bib0860"><span class="elsevierStyleSup">72</span></a></p><p id="par0165" class="elsevierStylePara elsevierViewall">Patients with CTEPD without PH at rest may benefit from PEA after careful consideration of the risk/benefit ratio. Two studies have reported clinical and/or hemodynamic improvement after PEA.<a class="elsevierStyleCrossRefs" href="#bib0865"><span class="elsevierStyleSup">73,74</span></a></p></span><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">Balloon pulmonary angioplasty</span><p id="par0170" class="elsevierStylePara elsevierViewall">BPA is a catheter-based intervention in which a balloon is inflated to dilate branches of the PA and restore blood flow. There are several types of lesions which correlate with angioplasty success rates and complications: ring-like stenoses (type A), web lesions (type B), subtotal occlusions (type C), total occlusions (type D), and tortuous lesions (type E).<a class="elsevierStyleCrossRef" href="#bib0875"><span class="elsevierStyleSup">75</span></a> BPA leads to rupture of these fibrotic lesions, with subsequent increase in antegrade flow and improvements in lung perfusion and RV afterload.<a class="elsevierStyleCrossRef" href="#bib0505"><span class="elsevierStyleSup">1</span></a></p><p id="par0175" class="elsevierStylePara elsevierViewall">The use of BPA was first reported in 18 patients in 2001; however, due to the development of reperfusion edema in 11 of them, with three requiring mechanical ventilation, the technique was abandoned.<a class="elsevierStyleCrossRef" href="#bib0880"><span class="elsevierStyleSup">76</span></a> Over the following decade, Japanese interventionalists refined the procedure and presented promising results: a multicenter registry with a total of 308 patients revealed improvement of hemodynamic parameters, significant reduction of concomitant PH drug therapy and oxygen, and overall survival of 96.8% at one and two years and 94.5% at three years.<a class="elsevierStyleCrossRef" href="#bib0885"><span class="elsevierStyleSup">77</span></a> BPA also improves RV function, symptoms, and functional capacity, as has been demonstrated in several other centers.<a class="elsevierStyleCrossRefs" href="#bib0890"><span class="elsevierStyleSup">78–83</span></a> In the most recent European guidelines, it is currently recommended for treatment of selected patients with inoperable CTEPH or persistent/recurrent PH after PEA.<a class="elsevierStyleCrossRef" href="#bib0510"><span class="elsevierStyleSup">2</span></a> This selection should be carried out by multidisciplinary teams in expert centers.</p><p id="par0180" class="elsevierStylePara elsevierViewall">Treatment goals are not universally agreed. According to a recent European consensus document on BPA, patients should ideally experience symptom relief at rest and during exercise, with treatment of all lesions if possible.<a class="elsevierStyleCrossRef" href="#bib0920"><span class="elsevierStyleSup">84</span></a> Further goals should include improvement in quality of life, hemodynamics, and gas exchange. The minimum hemodynamic goal of BPA is a final mPAP <30 mmHg, due to its prognostic significance.</p><p id="par0185" class="elsevierStylePara elsevierViewall">BPA is associated with other complications, such as vascular injury due to wire perforation and lung injury with hemoptysis and/or hypoxia.<a class="elsevierStyleCrossRef" href="#bib0510"><span class="elsevierStyleSup">2</span></a> Growing operator experience has led to a lower level of complications and periprocedural mortality, which was recently reported as 0.2%.<a class="elsevierStyleCrossRef" href="#bib0925"><span class="elsevierStyleSup">85</span></a> Nowadays, BPA is performed in multiple sessions in order to reduce the risk of reperfusion injury.<a class="elsevierStyleCrossRef" href="#bib0505"><span class="elsevierStyleSup">1</span></a> Therefore, BPA should be performed in high-volume CTEPH centers.<a class="elsevierStyleCrossRef" href="#bib0510"><span class="elsevierStyleSup">2</span></a></p><p id="par0190" class="elsevierStylePara elsevierViewall">Besides severe contrast allergy, there are no absolute contraindications to BPA.<a class="elsevierStyleCrossRef" href="#bib0505"><span class="elsevierStyleSup">1</span></a> However, tortuous lesions constitute a lesion-based relative contraindication, due to their complexity and higher risk of complications.<a class="elsevierStyleCrossRef" href="#bib0505"><span class="elsevierStyleSup">1</span></a></p><p id="par0195" class="elsevierStylePara elsevierViewall">Regarding CTEPD without PH, selected symptomatic patients may benefit from BPA, with clinical and hemodynamic improvement.<a class="elsevierStyleCrossRefs" href="#bib0510"><span class="elsevierStyleSup">2,86</span></a></p></span></span><span id="sec0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Drugs used to treat pulmonary hypertension</span><p id="par0200" class="elsevierStylePara elsevierViewall">The theoretical target of PH drugs in CTEPH is precapillary microvasculopathy, similar to that observed in PAH. Several pulmonary vasodilators have been used in CTEPH, particularly in persistent/recurrent cases after PEA or in inoperable cases. The current European guidelines<a class="elsevierStyleCrossRef" href="#bib0510"><span class="elsevierStyleSup">2</span></a> recommend riociguat in such cases (class I, level B recommendation) and consideration of high-dose subcutaneous treprostinil in patients who remain in WHO functional class III–IV (class IIb, level B recommendation).<a class="elsevierStyleCrossRef" href="#bib0510"><span class="elsevierStyleSup">2</span></a> This is based on the results of the CHEST and CTREPH trials, respectively, which demonstrated improvement in 6-min walk test (6MWT) distance, hemodynamic parameters, functional class and N-terminal pro-brain natriuretic peptide levels.<a class="elsevierStyleCrossRefs" href="#bib0685"><span class="elsevierStyleSup">37,38,40</span></a> These results led to approval of the drugs for CTEPH in the European Union.</p><p id="par0205" class="elsevierStylePara elsevierViewall">Other drugs such as bosentan and sildenafil are used off-label, as they lack proven efficacy.<a class="elsevierStyleCrossRefs" href="#bib0935"><span class="elsevierStyleSup">87,88</span></a> A recent small Japanese trial also demonstrated the benefit of selexipag in CTEPH patients regarding hemodynamic parameters.<a class="elsevierStyleCrossRef" href="#bib0945"><span class="elsevierStyleSup">89</span></a> However, a more recent study with the same drug was terminated early due to lack of efficacy at interim analysis (ClinicalTrials.gov identifier: <a href="ctgov:NCT03689244">NCT03689244</a>). <a class="elsevierStyleCrossRef" href="#tbl0015">Table 3</a> summarizes the completed trials of medical therapy in CTEPH.</p><elsevierMultimedia ident="tbl0015"></elsevierMultimedia></span><span id="sec0060" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Multimodality treatment</span><p id="par0210" class="elsevierStylePara elsevierViewall">Given the advances in the various treatment options available, a multimodality strategy may be adopted to fully cover the whole spectrum of vascular lesions in CTEPH patients. Again, as there are no standardized guidelines for patient selection, this should be done case by case in expert centers by a multidisciplinary team consisting of a PEA surgeon, a BPA expert, a PH specialist and a thoracic radiologist.<a class="elsevierStyleCrossRef" href="#bib0515"><span class="elsevierStyleSup">3</span></a> A proposed management algorithm with all three modalities is shown in <a class="elsevierStyleCrossRef" href="#fig0045">Figure 9</a>.</p><elsevierMultimedia ident="fig0045"></elsevierMultimedia><p id="par0215" class="elsevierStylePara elsevierViewall">As patients can have both operable and inoperable lesions, combining PEA and BPA may be required. One study reported favorable outcomes in patients with accessible lesions in one lung and inoperable lesions in the other, with improvement in PVR and WHO functional class at mid-term follow-up.<a class="elsevierStyleCrossRef" href="#bib0950"><span class="elsevierStyleSup">90</span></a> BPA could also be beneficial in residual PH after PEA, with reports of hemodynamic and functional class improvement.<a class="elsevierStyleCrossRefs" href="#bib0955"><span class="elsevierStyleSup">91,92</span></a></p><p id="par0220" class="elsevierStylePara elsevierViewall">The role of medical therapy in persistent/recurrent PH following PEA has been detailed previously in this article. The use of vasodilators as bridging therapy in patients with preoperative PVR is more controversial. Most studies in the literature report hemodynamic improvement prior to PEA, but no additional benefit after it.<a class="elsevierStyleCrossRefs" href="#bib0515"><span class="elsevierStyleSup">3,63</span></a> In the International CTEPH registry, bridging therapy was associated with higher mortality, possibly due to delaying surgery.<a class="elsevierStyleCrossRef" href="#bib0965"><span class="elsevierStyleSup">93</span></a> However, a more recent retrospective study demonstrated better one-year survival in patients previously treated with vasodilators.<a class="elsevierStyleCrossRef" href="#bib0970"><span class="elsevierStyleSup">94</span></a> More trials are needed to further clarify this issue.</p><p id="par0225" class="elsevierStylePara elsevierViewall">Concomitant use of BPA and medical therapy has been commonly applied, since the latter reduces pre-BPA mPAP. Feinstein et al. demonstrated a correlation between development of reperfusion injury and pre-BPA mPAP >35 mmHg.<a class="elsevierStyleCrossRef" href="#bib0880"><span class="elsevierStyleSup">76</span></a> Additionally, patients who are started on vasodilators may benefit from symptom improvement between BPA sessions.<a class="elsevierStyleCrossRef" href="#bib0815"><span class="elsevierStyleSup">63</span></a> The results of the recently published RACE trial comparing riociguat with BPA in newly diagnosed inoperable CTEPH highlight the potential benefits of multimodality treatment.<a class="elsevierStyleCrossRef" href="#bib0975"><span class="elsevierStyleSup">95</span></a> In that study, patients were randomized to either BPA or riociguat and had the option of crossover at 26 weeks if predefined goals were not met. Although patients first treated by BPA had a greater reduction in PVR, they experienced a higher rate of treatment-related adverse events than patients who were first treated with riociguat. The current guidelines accordingly recommend PH therapy before BPA when PVR is >4 Wood units, as this has demonstrated additive benefits and improved safety.<a class="elsevierStyleCrossRef" href="#bib0975"><span class="elsevierStyleSup">95</span></a></p></span><span id="sec0065" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Lung transplantation</span><p id="par0230" class="elsevierStylePara elsevierViewall">Given the various treatment options for CTEPH, lung transplantation is now rarely considered in this patient group.<a class="elsevierStyleCrossRef" href="#bib0515"><span class="elsevierStyleSup">3</span></a> It could be considered in highly selected cases, as an alternative to failed PEA or inoperable disease not amenable to other medical or surgical treatment; however, data on the outcomes are scarce and some studies report high morbidity and mortality.<a class="elsevierStyleCrossRef" href="#bib0980"><span class="elsevierStyleSup">96</span></a></p></span><span id="sec0070" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Rehabilitation</span><p id="par0235" class="elsevierStylePara elsevierViewall">The role of rehabilitation in CTEPH and PAH is well established, although exercise physiology is slightly different for the two conditions.<a class="elsevierStyleCrossRef" href="#bib0985"><span class="elsevierStyleSup">97</span></a> Most of the pivotal rehabilitation trials were based on in-hospital training in tertiary referral set-ups. Small non-randomized studies showed that home-based rehabilitation may also be an effective and safe option. However, exercise training in PH should be individually adjusted and closely supervised by both PH experts and physiatrists who are experienced in the rehabilitation of severely compromised patients. Patients should be on optimized treatment and in a stable clinical condition before entering a rehabilitation program.<a class="elsevierStyleCrossRef" href="#bib0510"><span class="elsevierStyleSup">2</span></a></p><p id="par0240" class="elsevierStylePara elsevierViewall">Another potential role for rehabilitation is in the recovery phase after PEA and BPA. To date, the potential role of rehabilitation after PEA has only been studied in a small non-randomized retrospective study,<a class="elsevierStyleCrossRef" href="#bib0990"><span class="elsevierStyleSup">98</span></a> in which significant changes in 6MWD were observed during the three-month rehabilitation period. In a prospective randomized study,<a class="elsevierStyleCrossRef" href="#bib0995"><span class="elsevierStyleSup">99</span></a> the authors studied the impact of rehabilitation directly after BPA, demonstrating that a combined approach of BPA and rehabilitation sessions was more successful than BPA alone. Based on these studies, a carefully monitored rehabilitation program after surgical or BPA treatment could be considered standard of care.</p><p id="par0245" class="elsevierStylePara elsevierViewall">Larger-scale RCTs are needed to define the optimal training methodology and timing of exercise training in CTEPD.</p></span><span id="sec0075" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">Novel techniques</span><p id="par0250" class="elsevierStylePara elsevierViewall">Pulmonary denervation (PD) is a novel technique that has been explored in PH. Regarding CTEPH, one study comparing PD with riociguat in patients with residual PH after PEA showed substantial reduction of PVR and improvement of 6MWT distance.<a class="elsevierStyleCrossRef" href="#bib1000"><span class="elsevierStyleSup">100</span></a></p></span></span><span id="sec0080" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0100">Follow-up</span><p id="par0255" class="elsevierStylePara elsevierViewall">Current European guidelines suggest regular follow-up of CTEPH patients, including invasive assessment with RHC, 3–6 months after intervention and yearly non-invasive follow-up with echocardiography and assessment of exercise capacity, in order to rule out recurrent PH.<a class="elsevierStyleCrossRef" href="#bib0510"><span class="elsevierStyleSup">2</span></a> Although there is no consensus on the therapeutic target in CTEPH, experts aim for WHO functional class I-II, improvement in quality of life and normalization or near normalization of hemodynamics at rest (assessed by RHC at 3–6 months after intervention).<a class="elsevierStyleCrossRef" href="#bib0510"><span class="elsevierStyleSup">2</span></a></p></span><span id="sec0085" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0105">Conclusion</span><p id="par0260" class="elsevierStylePara elsevierViewall">CTEPD/CTEPH is a complex disease that combines unresolved vascular occlusions and microvasculopathy. Recent advances in the field have led to better diagnostic performance, as well as development and improvement of treatment modalities that complement each other and improve patients’ survival and quality of life. These patients should be managed in expert centers in a multidisciplinary fashion. Future studies are still needed to further clarify the gaps in evidence.</p></span><span id="sec0090" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0110">Conflicts of interest</span><p id="par0265" class="elsevierStylePara elsevierViewall">The authors have no conflicts of interest to declare.</p></span></span>" "textoCompletoSecciones" => array:1 [ "secciones" => array:14 [ 0 => array:3 [ "identificador" => "xres2208800" "titulo" => "Abstract" "secciones" => array:1 [ 0 => array:1 [ "identificador" => "abst0005" ] ] ] 1 => array:2 [ "identificador" => "xpalclavsec1852914" "titulo" => "Keywords" ] 2 => array:3 [ "identificador" => "xres2208801" "titulo" => "Resumo" "secciones" => array:1 [ 0 => array:1 [ "identificador" => "abst0010" ] ] ] 3 => array:2 [ "identificador" => "xpalclavsec1852915" "titulo" => "Palavras-chave" ] 4 => array:2 [ "identificador" => "sec0005" "titulo" => "Introduction" ] 5 => array:2 [ "identificador" => "sec0010" "titulo" => "Epidemiology" ] 6 => array:2 [ "identificador" => "sec0015" "titulo" => "Risk factors" ] 7 => array:2 [ "identificador" => "sec0020" "titulo" => "Pathophysiology" ] 8 => array:2 [ "identificador" => "sec0025" "titulo" => "Diagnosis" ] 9 => array:3 [ "identificador" => "sec0030" "titulo" => "Treatment" "secciones" => array:7 [ 0 => array:2 [ "identificador" => "sec0035" "titulo" => "Anticoagulation" ] 1 => array:3 [ "identificador" => "sec0040" "titulo" => "Mechanical treatment" "secciones" => array:2 [ 0 => array:2 [ "identificador" => "sec0045" "titulo" => "Pulmonary endarterectomy" ] 1 => array:2 [ "identificador" => "sec0050" "titulo" => "Balloon pulmonary angioplasty" ] ] ] 2 => array:2 [ "identificador" => "sec0055" "titulo" => "Drugs used to treat pulmonary hypertension" ] 3 => array:2 [ "identificador" => "sec0060" "titulo" => "Multimodality treatment" ] 4 => array:2 [ "identificador" => "sec0065" "titulo" => "Lung transplantation" ] 5 => array:2 [ "identificador" => "sec0070" "titulo" => "Rehabilitation" ] 6 => array:2 [ "identificador" => "sec0075" "titulo" => "Novel techniques" ] ] ] 10 => array:2 [ "identificador" => "sec0080" "titulo" => "Follow-up" ] 11 => array:2 [ "identificador" => "sec0085" "titulo" => "Conclusion" ] 12 => array:2 [ "identificador" => "sec0090" "titulo" => "Conflicts of interest" ] 13 => array:1 [ "titulo" => "References" ] ] ] "pdfFichero" => "main.pdf" "tienePdf" => true "fechaRecibido" => "2023-11-22" "fechaAceptado" => "2024-04-17" "PalabrasClave" => array:2 [ "en" => array:1 [ 0 => array:4 [ "clase" => "keyword" "titulo" => "Keywords" "identificador" => "xpalclavsec1852914" "palabras" => array:6 [ 0 => "Chronic thromboembolic pulmonary hypertension" 1 => "Pulmonary hypertension" 2 => "Multidisciplinary team" 3 => "Pulmonary endarterectomy" 4 => "Balloon pulmonary angioplasty" 5 => "Pulmonary vasodilators" ] ] ] "pt" => array:1 [ 0 => array:4 [ "clase" => "keyword" "titulo" => "Palavras-chave" "identificador" => "xpalclavsec1852915" "palabras" => array:6 [ 0 => "Hipertensão pulmonar tromboembólica crónica" 1 => "Hipertensão pulmonar" 2 => "Equipa multidisciplinar" 3 => "Tromboendarterectomia pulmonar" 4 => "Angioplastia pulmonar por balão" 5 => "Vasodilatadores pulmonares" ] ] ] ] "tieneResumen" => true "resumen" => array:2 [ "en" => array:2 [ "titulo" => "Abstract" "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Chronic thromboembolic pulmonary hypertension (CTEPH) is part of group 4 of the pulmonary hypertension (PH) classification and generally affects more than a third of patients referred to PH centers. It is a three-compartment disease involving proximal (lobar-to-segmental) and distal (subsegmental) pulmonary arteries that are obstructed by persistent fibrothrombotic material, and precapillary pulmonary arteries that can be affected as in pulmonary arterial hypertension. It is a rare complication of pulmonary embolism (PE), with an incidence of around 3% in PE survivors. The observed incidence of CTEPH in the general population is around six cases per million but could be three times higher than this, as estimated from PE incidence. However, a previous venous thromboembolic episode is not always documented. With advances in multimodality imaging and therapeutic management, survival for CTEPH has improved for both operable and inoperable patients. Advanced imaging with pulmonary angiography helps distinguish proximal from distal obstructive disease. However, right heart catheterization is of utmost importance to establish the diagnosis and hemodynamic severity of PH. The therapeutic strategy relies on a stepwise approach, starting with an operability assessment. Pulmonary endarterectomy (PEA), also known as pulmonary thromboendarterectomy, is the first-line treatment for operable patients. Growing experience and advances in surgical technique have enabled expansion of the distal limits of PEA and significant improvements in perioperative and mid- to long-term mortality. In patients who are inoperable or who have persistent/recurrent PH after PEA, medical therapy and/or balloon pulmonary angioplasty (BPA) are effective treatment options with favorable outcomes that are increasingly used. All treatment decisions should be made with a multidisciplinary team that includes a PEA surgeon, a BPA expert, and a chest radiologist.</p></span>" ] "pt" => array:2 [ "titulo" => "Resumo" "resumen" => "<span id="abst0010" class="elsevierStyleSection elsevierViewall"><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">A hipertensão pulmonar tromboembólica crónica (CTEPH) pertence ao grupo 4 da classificação da hipertensão pulmonar (PH) e geralmente afeta mais de um terço dos doentes referenciados a centros de PH. É uma doença tricompartimental que envolve as artérias pulmonares proximais (lobares e segmentares) e distais (subsegmentares), que são obstruídas por material fibro-trombótico persistente, bem como as artérias pulmonares pré-capilares, que são afetadas de forma semelhante à observada na hipertensão arterial pulmonar. É considerada uma complicação rara do tromboembolismo pulmonar (PE), com uma incidência de cerca de 3% nos sobreviventes de PE. A incidência da CTEPH na população geral ronda os seis casos por milhão, mas poderá ser três vezes superior, de acordo com a incidência de PE. Contudo, nem sempre é documentado um episódio prévio de tromboembolismo venoso.</p><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">Com os avanços na imagiologia multimodal e na gestão terapêutica, a sobrevivência dos doentes com CTEPH tem aumentado em doentes operáveis e inoperáveis. Técnicas de imagem avançada com angiografia pulmonar auxiliam na distinção entre doença obstrutiva proximal e distal. No entanto, o cateterismo do coração direito é de importância fulcral no estabelecimento do diagnóstico e da gravidade hemodinâmica da PH. A estratégia terapêutica centra-se numa abordagem faseada que começa na avaliação da operabilidade. A tromboendarterectomia pulmonar (PEA) é o tratamento de primeira linha em doentes operáveis. O aumento da experiência e os avanços na técnica cirúrgica têm permitido a expansão dos limites distais da PEA e a melhoria significativa da mortalidade peri-operatória e a médio e longo prazo. Em doentes inoperáveis ou com CTEPH persistente/recorrente após PEA, a terapêutica médica e/ou a angioplastia pulmonar por balão (BPA) são opções terapêuticas eficazes, com resultados favoráveis e que têm sido cada vez mais utilizadas. Todas as decisões terapêuticas devem ser tomadas em equipa multidisciplinar que inclui um cirurgião de PEA, um expert de BPA e um radiologista torácico.</p></span>" ] ] "NotaPie" => array:1 [ 0 => array:3 [ "etiqueta" => "1" "nota" => "<p class="elsevierStyleNotepara" id="npar0010">These authors contributed equally.</p>" "identificador" => "fn0005" ] ] "multimedia" => array:12 [ 0 => array:7 [ "identificador" => "fig0005" "etiqueta" => "Figure 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 1571 "Ancho" => 3342 "Tamanyo" => 335155 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">Risk factors for chronic thromboembolic pulmonary hypertension. APL: antiphospholipid; IBD: inflammatory bowel disease; PE: pulmonary embolism; RV: right ventricle; VA: ventriculoatrial; vWF: von Willebrand factor.</p> <p id="spar0120" class="elsevierStyleSimplePara elsevierViewall">Created with BioRender.com.</p>" ] ] 1 => array:7 [ "identificador" => "fig0010" "etiqueta" => "Figure 2" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr2.jpeg" "Alto" => 2968 "Ancho" => 2750 "Tamanyo" => 720711 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">The pathophysiology and multimodality treatment of chronic thromboembolic pulmonary hypertension. (a) Proximal lesions in lobar and segmental arteries (top); fibrotic, collagen-rich lesions, treated by pulmonary endarterectomy (bottom); (b) distal lesions in segmental and subsegmental arteries (top); balloon pulmonary angioplasty in a segmental branch (bottom) before (1) and after (2); (c) microvasculopathy lesions (top); small arteries with intimal thickening and fibrosis, which are treated with medical therapy (bottom). BPA: balloon pulmonary angioplasty; PA: pulmonary artery; PEA: pulmonary endarterectomy.</p> <p id="spar0125" class="elsevierStyleSimplePara elsevierViewall">Created with BioRender.com.</p>" ] ] 2 => array:7 [ "identificador" => "fig0015" "etiqueta" => "Figure 3" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr3.jpeg" "Alto" => 1882 "Ancho" => 3417 "Tamanyo" => 387835 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">Types of vascular lesions in chronic thromboembolic pulmonary disease.</p> <p id="spar0130" class="elsevierStyleSimplePara elsevierViewall">Created with BioRender.com.</p>" ] ] 3 => array:7 [ "identificador" => "fig0020" "etiqueta" => "Figure 4" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr4.jpeg" "Alto" => 1994 "Ancho" => 3166 "Tamanyo" => 2243931 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">Histopathology of chronic thromboembolic pulmonary hypertension in explanted lungs (H&E stain). (a) A thrombus underwent organization and recanalization within the lumen of a proximal branch of the pulmonary artery; (b) aggregates of foamy histiocytes denote atheromatous lesions in a large-caliber vessel, pictured alongside small parenchymal venules with remodeling; (c–e) proximal and subsegmental branches of the pulmonary artery exhibit a range of fibromuscular proliferation and fibrosis (±calcification) of the wall; (f) an area of hemangiomatosis stands out from the surrounding parenchyma, due to broadened alveolar walls; (g and h) higher magnification reveals capillary proliferation, with congestion and extravasated red blood cells; hemosiderophages can be seen within the alveolar spaces; (i) small parenchymal venules, usually inconspicuous, become readily recognizable due to marked thickening of the wall.</p>" ] ] 4 => array:7 [ "identificador" => "fig0025" "etiqueta" => "Figure 5" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr5.jpeg" "Alto" => 2701 "Ancho" => 3417 "Tamanyo" => 1027815 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">Computed tomography pulmonary angiography findings in chronic thromboembolic pulmonary hypertension. (A) Coronal image showing fibrothrombotic retraction with partial obstruction (yellow arrow) and eccentrically located thrombus with a broad base forming obtuse angles with the vessel wall, due to incomplete thrombus resolution (blue arrow); (B) axial image with intravascular webs (purple arrows); (C) axial image with total left PA occlusion (red arrow) and segmental arterial retraction (orange arrow); (D) calcifications within fibrothrombotic deposits in the right PA, illustrating the chronic component of the disease (green arrows); (E) axial image depicting main PA dilatation (double-headed arrow); (F) sagittal image showing RV outflow tract hypertrophy (double-headed arrow); (G) cardiac short-axis image with flattening of the interventricular septum (black arrows) and D-shaped left ventricle; (H) axial image showing segmental artery-to-bronchus diameter ratio of >1:1 (arrowheads), flattening of the interventricular septum, RV hypertrophy and RV/LV diameter ratio >1 (double-headed arrow); (I) peripheral nodular opacity (brown arrow) in the right upper lobe secondary to previous pulmonary infarction along with intra-arterial fibrothrombotic deposits (blue arrows); (J) axial image showing sharply demarcated segmental and subsegmental areas of hypo- and hyperattenuation (dotted lines); (K) (same patient as in panel J) color maps showing the distribution of perfusion: spectrum from green to red indicates increasing perfusion (hypoperfusion indicated by green areas); (L) sagittal image with bronchial artery hypertrophy (blue arrows). LV: left ventricular; PA: pulmonary artery; RV: right ventricular.</p>" ] ] 5 => array:7 [ "identificador" => "fig0030" "etiqueta" => "Figure 6" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr6.jpeg" "Alto" => 4255 "Ancho" => 3417 "Tamanyo" => 581133 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">Diagnostic algorithm in patients with suspected chronic thromboembolic pulmonary disease/hypertension. CO: cardiac output; CTEPD: chronic thromboembolic pulmonary disease; CTEPH: chronic thromboembolic pulmonary hypertension; CPET: cardiopulmonary exercise test; CTPA: computed tomography pulmonary angiography; DECT: dual-energy computed tomography; DSA: digital subtraction angiography; mPAP: mean pulmonary artery pressure; MRI: magnetic resonance imaging; N: no; PAH: pulmonary arterial hypertension; PASP: pulmonary artery systolic pressure; PE: pulmonary embolism; PETCO<span class="elsevierStyleInf">2</span>: end-tidal partial pressure of carbon dioxide; RHC: right heart catheterization; SPECT: single-photon emission computed tomography; V/Q: ventilation/perfusion; VE/VCO<span class="elsevierStyleInf">2</span>: ventilatory equivalent for carbon dioxide; VO<span class="elsevierStyleInf">2</span>/HR: oxygen pulse; VO<span class="elsevierStyleInf">2</span>: oxygen uptake; Y: yes.</p> <p id="spar0050" class="elsevierStyleSimplePara elsevierViewall"><span class="elsevierStyleSup">a</span>Could also be considered in rapidly deteriorating patients.</p> <p id="spar0055" class="elsevierStyleSimplePara elsevierViewall"><span class="elsevierStyleSup">b</span>Follow-up echocardiogram could be considered if symptoms persist.</p> <p id="spar0060" class="elsevierStyleSimplePara elsevierViewall"><span class="elsevierStyleSup">c</span>SPECT V/Q, DECT or MRI perfusion.</p> <p id="spar0065" class="elsevierStyleSimplePara elsevierViewall"><span class="elsevierStyleSup">d</span>Low PETCO<span class="elsevierStyleInf">2</span>, high VE/VCO<span class="elsevierStyleInf">2</span>, low VO<span class="elsevierStyleInf">2</span>/HR and low peak VO<span class="elsevierStyleInf">2</span> on CPET or mPAP/CO slope between rest and exercise >3 mmHg/l/min on RHC.</p> <p id="spar0135" class="elsevierStyleSimplePara elsevierViewall">Created with BioRender.com.</p>" ] ] 6 => array:7 [ "identificador" => "fig0035" "etiqueta" => "Figure 7" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr7.jpeg" "Alto" => 665 "Ancho" => 750 "Tamanyo" => 36224 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0070" class="elsevierStyleSimplePara elsevierViewall">Planar V/Q scan in a chronic thromboembolic pulmonary hypertension patient with multiple perfusion defects. The red arrows highlight a ventilation/perfusion mismatch in the superior segment of the right lower lobe, seen from two different angles. LPO: left posterior oblique; Q: perfusion, RPO: right posterior oblique, V: ventilation.</p>" ] ] 7 => array:7 [ "identificador" => "fig0040" "etiqueta" => "Figure 8" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr8.jpeg" "Alto" => 1201 "Ancho" => 975 "Tamanyo" => 107310 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0075" class="elsevierStyleSimplePara elsevierViewall">Magnetic resonance imaging angiogram demonstrating chronic thromboembolic pulmonary hypertension in an operable distribution, affecting the right middle and lower lobes as well as the left lower lobe. There is also evidence of tricuspid regurgitation with retrograde flow of contrast into the hepatic veins.</p>" ] ] 8 => array:7 [ "identificador" => "fig0045" "etiqueta" => "Figure 9" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr9.jpeg" "Alto" => 4015 "Ancho" => 2667 "Tamanyo" => 438760 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0080" class="elsevierStyleSimplePara elsevierViewall">Multimodal management of patients with chronic thromboembolic pulmonary hypertension. BPA: balloon pulmonary angioplasty; CTEPD: chronic thromboembolic pulmonary disease; CTEPH: chronic thromboembolic pulmonary hypertension; PEA: pulmonary endarterectomy; PH: pulmonary hypertension. <span class="elsevierStyleSup">a</span>Some patients with CTEPD without PH at rest might benefit from PEA and/or BPA.</p> <p id="spar0140" class="elsevierStyleSimplePara elsevierViewall">Created with BioRender.com.</p>" ] ] 9 => array:8 [ "identificador" => "tbl0005" "etiqueta" => "Table 1" "tipo" => "MULTIMEDIATABLA" "mostrarFloat" => true "mostrarDisplay" => false "detalles" => array:1 [ 0 => array:3 [ "identificador" => "at1" "detalle" => "Table " "rol" => "short" ] ] "tabla" => array:2 [ "leyenda" => "<p id="spar0090" class="elsevierStyleSimplePara elsevierViewall">CT: computed tomography; PE: pulmonary embolism; RV: right ventricle.</p><p id="spar0095" class="elsevierStyleSimplePara elsevierViewall">Low risk: −6 to 6 points; high risk: >6 points.</p>" "tablatextoimagen" => array:1 [ 0 => array:2 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col" style="border-bottom: 2px solid black"> \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Points \t\t\t\t\t\t\n \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Unprovoked PE \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">+6 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Known hypothyroidism \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">+3 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Symptom onset >2 weeks before PE diagnosis \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">+3 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">RV dysfunction on CT or echocardiography \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">+2 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Known diabetes mellitus \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">-3 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Thrombolytic therapy or embolectomy for PE \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">-3 \t\t\t\t\t\t\n \t\t\t\t</td></tr></tbody></table> """ ] "imagenFichero" => array:1 [ 0 => "xTab3603747.png" ] ] ] ] "descripcion" => array:1 [ "en" => "<p id="spar0085" class="elsevierStyleSimplePara elsevierViewall">Chronic thromboembolic pulmonary hypertension prediction score.</p>" ] ] 10 => array:8 [ "identificador" => "tbl0010" "etiqueta" => "Table 2" "tipo" => "MULTIMEDIATABLA" "mostrarFloat" => true "mostrarDisplay" => false "detalles" => array:1 [ 0 => array:3 [ "identificador" => "at2" "detalle" => "Table " "rol" => "short" ] ] "tabla" => array:3 [ "leyenda" => "<p id="spar0105" class="elsevierStyleSimplePara elsevierViewall">AR: aortic root; IVC: inferior vena cava; LV: left ventricular; PA: pulmonary artery; PASP: pulmonary arterial systolic pressure; PH: pulmonary hypertension; RA: right atrial; RV: right ventricular; RVOT AT: right ventricular outflow tract acceleration time; TAPSE: tricuspid annular plane systolic excursion.</p>" "tablatextoimagen" => array:2 [ 0 => array:2 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Peak tricuspid regurgitation velocity (m/s) \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Presence of other echocardiographic PH signs<a class="elsevierStyleCrossRef" href="#tblfn0005"><span class="elsevierStyleSup">a</span></a> \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Probability \t\t\t\t\t\t\n \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">≤2.8 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">− \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Low \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">2.8–3.4 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">+ \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Intermediate \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t"> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">− \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t"> \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">>3.4 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">+ \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">High \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t"> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">− or + \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="\n \t\t\t\t\ttop\n \t\t\t\t"> \t\t\t\t\t\t\n \t\t\t\t</td></tr></tbody></table> """ ] "imagenFichero" => array:1 [ 0 => "xTab3603745.png" ] ] 1 => array:2 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " colspan="3" align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Other echocardiographic signs of PH</th></tr><tr title="table-row"><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Ventricles \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col" style="border-bottom: 2px solid black">PA \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col" style="border-bottom: 2px solid black">IVC and RA \t\t\t\t\t\t\n \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">RV/LV basal diameter ratio >1.0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">RVOT AT <105 ms and/or mid-systolic notching \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " rowspan="2" align="left" valign="middle">IVC diameter 21 mm and decreased inspiratory collapse</td></tr><tr title="table-row"><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">LV eccentricity index >1.1 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Early diastolic pulmonary regurgitation velocity >2.2 m/s \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">TAPSE/PASP ratio <0.55 mm/mmHg \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">PA diameter >25 mm or >AR diameter \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">RA area (end-systole) <span class="elsevierStyleMonospace">></span>18 cm<span class="elsevierStyleSup">2</span> \t\t\t\t\t\t\n \t\t\t\t</td></tr></tbody></table> """ ] "imagenFichero" => array:1 [ 0 => "xTab3603744.png" ] ] ] "notaPie" => array:1 [ 0 => array:3 [ "identificador" => "tblfn0005" "etiqueta" => "a" "nota" => "<p class="elsevierStyleNotepara" id="npar0005">Signs of at least two categories must be present.</p>" ] ] ] "descripcion" => array:1 [ "en" => "<p id="spar0100" class="elsevierStyleSimplePara elsevierViewall">Echocardiographic probability of pulmonary hypertension.</p>" ] ] 11 => array:8 [ "identificador" => "tbl0015" "etiqueta" => "Table 3" "tipo" => "MULTIMEDIATABLA" "mostrarFloat" => true "mostrarDisplay" => false "detalles" => array:1 [ 0 => array:3 [ "identificador" => "at3" "detalle" => "Table " "rol" => "short" ] ] "tabla" => array:2 [ "leyenda" => "<p id="spar0115" class="elsevierStyleSimplePara elsevierViewall">CI: cardiac index; CO: cardiac output; FC: functional class; mPAP: mean pulmonary artery pressure; NT-proBNP: N-terminal pro-brain natriuretic peptide; PVR: pulmonary vascular resistance; SC: subcutaneous; TTCW: time to clinical worsening; 6MWD: 6-min walk distance.</p>" "tablatextoimagen" => array:1 [ 0 => array:2 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Study \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Authors (year) \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Drug \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col" style="border-bottom: 2px solid black">No. of patients \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Follow-up (weeks) \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Primary outcome \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Relevant secondary outcomes \t\t\t\t\t\t\n \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Sildenafil<a class="elsevierStyleCrossRef" href="#bib0940"><span class="elsevierStyleSup">88</span></a> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Suntharalingam et al. (2008) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Sildenafil (vs. placebo) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">19 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">12 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">6MWD (+17.9 m, p=0.385) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Improved PVR and FC \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">BENEFiT<a class="elsevierStyleCrossRef" href="#bib0935"><span class="elsevierStyleSup">87</span></a> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Jaïs et al. (2008) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Bosentan (vs. placebo) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">157 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">16 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">6MWD (+2.9 m, p<span class="elsevierStyleMonospace">=</span>0.054)PVR (−146 dyn·s·cm<span class="elsevierStyleSup">−5</span>, p<0.0001) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">No difference in FC or TTCW \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">CHEST-1<a class="elsevierStyleCrossRef" href="#bib0685"><span class="elsevierStyleSup">37</span></a> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Ghofrani et al. (2013) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Riociguat (vs. placebo) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">261 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">16 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">6MWD (+39 m, p<0.001) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Improved PVR, FC, mPAP and NT-proBNP \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">MERIT-1<a class="elsevierStyleCrossRef" href="#bib0710"><span class="elsevierStyleSup">42</span></a> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Ghofrani et al. (2017) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Macitentan (vs. placebo) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">80 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">16 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">PVR (−206 dyn·s·cm<span class="elsevierStyleSup">−5</span>, p<span class="elsevierStyleMonospace">=</span>0.041) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Improved 6MWD, CO, and NT-proBNP \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">CTREPH<a class="elsevierStyleCrossRef" href="#bib0700"><span class="elsevierStyleSup">40</span></a> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Sadushi-Kolici et al. (2019) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">SC treprostinil (30 ng/kg/min vs. 3 ng/kg/min) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">105 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">24 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">6MWD (+45 m, p<span class="elsevierStyleMonospace">=</span>0.00028) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Improved PVR, FC, mPAP, cardiac output and NT-proBNP \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Selexipag<a class="elsevierStyleCrossRef" href="#bib0945"><span class="elsevierStyleSup">89</span></a> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Ogo et al. (2022) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Selexipag (vs. placebo) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">78 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">20 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">PVR (−98.2 dyn·s·cm<span class="elsevierStyleSup">−5</span>, p<span class="elsevierStyleMonospace">=</span>0.006) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Improved CI and Borg dyspnea score. No difference in 6MWD or FC \t\t\t\t\t\t\n \t\t\t\t</td></tr></tbody></table> """ ] "imagenFichero" => array:1 [ 0 => "xTab3603746.png" ] ] ] ] "descripcion" => array:1 [ "en" => "<p id="spar0110" class="elsevierStyleSimplePara elsevierViewall">Randomized controlled trials of medical therapy in chronic thromboembolic pulmonary hypertension.</p>" ] ] ] "bibliografia" => array:2 [ "titulo" => "References" "seccion" => array:1 [ 0 => array:2 [ "identificador" => "bibs0015" "bibliografiaReferencia" => array:100 [ 0 => array:3 [ "identificador" => "bib0505" "etiqueta" => "1" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Chronic thromboembolic pulmonary hypertension: realising the potential of multimodal management" "autores" => array:1 [ 0 => array:2 [ …2] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.1016/S2213-2600(23)00292-8" "Revista" => array:6 [ "tituloSerie" => "Lancet Respir Med" "fecha" => "2023" "volumen" => "11" 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