array:25 [
  "pii" => "S0870255117301415"
  "issn" => "08702551"
  "doi" => "10.1016/j.repc.2017.02.005"
  "estado" => "S300"
  "fechaPublicacion" => "2017-04-01"
  "aid" => "972"
  "copyright" => "Sociedade Portuguesa de Cardiologia"
  "copyrightAnyo" => "2017"
  "documento" => "simple-article"
  "crossmark" => 1
  "licencia" => "http://creativecommons.org/licenses/by-nc-nd/4.0/"
  "subdocumento" => "dis"
  "cita" => "Rev Port Cardiol. 2017;36:247-9"
  "abierto" => array:3 [
    "ES" => true
    "ES2" => true
    "LATM" => true
  ]
  "gratuito" => true
  "lecturas" => array:2 [
    "total" => 2608
    "formatos" => array:3 [
      "EPUB" => 204
      "HTML" => 1935
      "PDF" => 469
    ]
  ]
  "itemSiguiente" => array:19 [
    "pii" => "S0870255117301324"
    "issn" => "08702551"
    "doi" => "10.1016/j.repc.2016.09.016"
    "estado" => "S300"
    "fechaPublicacion" => "2017-04-01"
    "aid" => "967"
    "copyright" => "Sociedade Portuguesa de Cardiologia"
    "documento" => "article"
    "crossmark" => 1
    "licencia" => "http://creativecommons.org/licenses/by-nc-nd/4.0/"
    "subdocumento" => "fla"
    "cita" => "Rev Port Cardiol. 2017;36:251-6"
    "abierto" => array:3 [
      "ES" => true
      "ES2" => true
      "LATM" => true
    ]
    "gratuito" => true
    "lecturas" => array:2 [
      "total" => 3489
      "formatos" => array:3 [
        "EPUB" => 193
        "HTML" => 2745
        "PDF" => 551
      ]
    ]
    "en" => array:13 [
      "idiomaDefecto" => true
      "cabecera" => "<span class="elsevierStyleTextfn">Original Article</span>"
      "titulo" => "Balloon aortic valvuloplasty in the transcatheter aortic valve implantation era&#58; A single-center registry"
      "tienePdf" => "en"
      "tieneTextoCompleto" => "en"
      "tieneResumen" => array:2 [
        0 => "en"
        1 => "pt"
      ]
      "paginas" => array:1 [
        0 => array:2 [
          "paginaInicial" => "251"
          "paginaFinal" => "256"
        ]
      ]
      "titulosAlternativos" => array:1 [
        "pt" => array:1 [
          "titulo" => "Valvuloplastia a&#243;rtica por bal&#227;o na era da implanta&#231;&#227;o de v&#225;lvula a&#243;rtica percut&#226;nea&#46; Um registo unic&#234;ntrico"
        ]
      ]
      "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" => "fig0005"
          "etiqueta" => "Figure 1"
          "tipo" => "MULTIMEDIAFIGURA"
          "mostrarFloat" => true
          "mostrarDisplay" => false
          "figura" => array:1 [
            0 => array:4 [
              "imagen" => "gr1.jpeg"
              "Alto" => 1276
              "Ancho" => 1600
              "Tamanyo" => 56909
            ]
          ]
          "descripcion" => array:1 [
            "en" => "<p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">Peak transaortic gradient assessed invasively pre- and post-transcatheter aortic valve implantation&#46;</p>"
          ]
        ]
      ]
      "autores" => array:1 [
        0 => array:2 [
          "autoresLista" => "Ana Rita G&#46; Francisco, Miguel Nobre Menezes, Pedro Carrilho Ferreira, Cl&#225;udia Jorge, Doroteia Silva, Eduardo Infante de Oliveira, Fausto J&#46; Pinto, Pedro Canas da Silva"
          "autores" => array:8 [
            0 => array:2 [
              "nombre" => "Ana Rita G&#46;"
              "apellidos" => "Francisco"
            ]
            1 => array:2 [
              "nombre" => "Miguel"
              "apellidos" => "Nobre Menezes"
            ]
            2 => array:2 [
              "nombre" => "Pedro"
              "apellidos" => "Carrilho Ferreira"
            ]
            3 => array:2 [
              "nombre" => "Cl&#225;udia"
              "apellidos" => "Jorge"
            ]
            4 => array:2 [
              "nombre" => "Doroteia"
              "apellidos" => "Silva"
            ]
            5 => array:2 [
              "nombre" => "Eduardo"
              "apellidos" => "Infante de Oliveira"
            ]
            6 => array:2 [
              "nombre" => "Fausto J&#46;"
              "apellidos" => "Pinto"
            ]
            7 => array:2 [
              "nombre" => "Pedro"
              "apellidos" => "Canas da Silva"
            ]
          ]
        ]
      ]
    ]
    "idiomaDefecto" => "en"
    "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S0870255117301324?idApp=UINPBA00004E"
    "url" => "/08702551/0000003600000004/v1_201704060057/S0870255117301324/v1_201704060057/en/main.assets"
  ]
  "itemAnterior" => array:20 [
    "pii" => "S0870255117301269"
    "issn" => "08702551"
    "doi" => "10.1016/j.repc.2016.09.014"
    "estado" => "S300"
    "fechaPublicacion" => "2017-04-01"
    "aid" => "963"
    "copyright" => "Sociedade Portuguesa de Cardiologia"
    "documento" => "article"
    "crossmark" => 1
    "licencia" => "http://creativecommons.org/licenses/by-nc-nd/4.0/"
    "subdocumento" => "fla"
    "cita" => "Rev Port Cardiol. 2017;36:239-46"
    "abierto" => array:3 [
      "ES" => true
      "ES2" => true
      "LATM" => true
    ]
    "gratuito" => true
    "lecturas" => array:2 [
      "total" => 3044
      "formatos" => array:3 [
        "EPUB" => 215
        "HTML" => 2315
        "PDF" => 514
      ]
    ]
    "en" => array:13 [
      "idiomaDefecto" => true
      "cabecera" => "<span class="elsevierStyleTextfn">Original Article</span>"
      "titulo" => "The importance of the neutrophil-to-lymphocyte ratio in patients with hypertrophic cardiomyopathy"
      "tienePdf" => "en"
      "tieneTextoCompleto" => "en"
      "tieneResumen" => array:2 [
        0 => "en"
        1 => "pt"
      ]
      "paginas" => array:1 [
        0 => array:2 [
          "paginaInicial" => "239"
          "paginaFinal" => "246"
        ]
      ]
      "titulosAlternativos" => array:1 [
        "pt" => array:1 [
          "titulo" => "A import&#226;ncia da rela&#231;&#227;o neutr&#243;filos&#47;linf&#243;citos em doentes com miocardiopatia hipertr&#243;fica"
        ]
      ]
      "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" => "fig0005"
          "etiqueta" => "Figure 1"
          "tipo" => "MULTIMEDIAFIGURA"
          "mostrarFloat" => true
          "mostrarDisplay" => false
          "figura" => array:1 [
            0 => array:4 [
              "imagen" => "gr1.jpeg"
              "Alto" => 2439
              "Ancho" => 3314
              "Tamanyo" => 337758
            ]
          ]
          "descripcion" => array:1 [
            "en" => "<p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">Neutrophil-to-lymphocyte ratio and &#40;a&#41; fragmented QRS&#44; &#40;b&#41; ejection fraction&#44; &#40;c&#41; ventricular tachycardia&#44; &#40;d&#41; predicted five-year risk of sudden cardiac death&#44; &#40;e&#41; corrected QT&#44; and &#40;f&#41; presyncope in patients with hypertrophic cardiomyopathy&#46; fQRS&#58; fragmented QRS&#59; LVEF&#58; left ventricular ejection fraction&#59; NLR&#58; neutrophil-to-lymphocyte ratio&#59; QTc&#58; corrected QT interval&#59; SCD&#58; sudden cardiac death&#59; VT&#58; ventricular tachycardia&#46;</p>"
          ]
        ]
      ]
      "autores" => array:1 [
        0 => array:2 [
          "autoresLista" => "Sinem Ozyilmaz, Ozgur Akgul, Huseyin Uyarel, Hamdi Pusuroglu, Mehmet Gul, Muhammet Hulusi Satilmisoglu, Ismail Bolat, Isa Ozyilmaz, Hakan U&#231;ar, Aydin Yildirim, Ihsan Bakir"
          "autores" => array:11 [
            0 => array:2 [
              "nombre" => "Sinem"
              "apellidos" => "Ozyilmaz"
            ]
            1 => array:2 [
              "nombre" => "Ozgur"
              "apellidos" => "Akgul"
            ]
            2 => array:2 [
              "nombre" => "Huseyin"
              "apellidos" => "Uyarel"
            ]
            3 => array:2 [
              "nombre" => "Hamdi"
              "apellidos" => "Pusuroglu"
            ]
            4 => array:2 [
              "nombre" => "Mehmet"
              "apellidos" => "Gul"
            ]
            5 => array:2 [
              "nombre" => "Muhammet Hulusi"
              "apellidos" => "Satilmisoglu"
            ]
            6 => array:2 [
              "nombre" => "Ismail"
              "apellidos" => "Bolat"
            ]
            7 => array:2 [
              "nombre" => "Isa"
              "apellidos" => "Ozyilmaz"
            ]
            8 => array:2 [
              "nombre" => "Hakan"
              "apellidos" => "U&#231;ar"
            ]
            9 => array:2 [
              "nombre" => "Aydin"
              "apellidos" => "Yildirim"
            ]
            10 => array:2 [
              "nombre" => "Ihsan"
              "apellidos" => "Bakir"
            ]
          ]
        ]
      ]
    ]
    "idiomaDefecto" => "en"
    "Traduccion" => array:1 [
      "en" => array:9 [
        "pii" => "S2174204917300880"
        "doi" => "10.1016/j.repce.2017.04.003"
        "estado" => "S300"
        "subdocumento" => ""
        "abierto" => array:3 [
          "ES" => true
          "ES2" => true
          "LATM" => true
        ]
        "gratuito" => true
        "lecturas" => array:1 [
          "total" => 0
        ]
        "idiomaDefecto" => "en"
        "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S2174204917300880?idApp=UINPBA00004E"
      ]
    ]
    "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S0870255117301269?idApp=UINPBA00004E"
    "url" => "/08702551/0000003600000004/v1_201704060057/S0870255117301269/v1_201704060057/en/main.assets"
  ]
  "asociados" => array:1 [
    0 => array:20 [
      "pii" => "S0870255117301269"
      "issn" => "08702551"
      "doi" => "10.1016/j.repc.2016.09.014"
      "estado" => "S300"
      "fechaPublicacion" => "2017-04-01"
      "aid" => "963"
      "copyright" => "Sociedade Portuguesa de Cardiologia"
      "documento" => "article"
      "crossmark" => 1
      "licencia" => "http://creativecommons.org/licenses/by-nc-nd/4.0/"
      "subdocumento" => "fla"
      "cita" => "Rev Port Cardiol. 2017;36:239-46"
      "abierto" => array:3 [
        "ES" => true
        "ES2" => true
        "LATM" => true
      ]
      "gratuito" => true
      "lecturas" => array:2 [
        "total" => 3044
        "formatos" => array:3 [
          "EPUB" => 215
          "HTML" => 2315
          "PDF" => 514
        ]
      ]
      "en" => array:13 [
        "idiomaDefecto" => true
        "cabecera" => "<span class="elsevierStyleTextfn">Original Article</span>"
        "titulo" => "The importance of the neutrophil-to-lymphocyte ratio in patients with hypertrophic cardiomyopathy"
        "tienePdf" => "en"
        "tieneTextoCompleto" => "en"
        "tieneResumen" => array:2 [
          0 => "en"
          1 => "pt"
        ]
        "paginas" => array:1 [
          0 => array:2 [
            "paginaInicial" => "239"
            "paginaFinal" => "246"
          ]
        ]
        "titulosAlternativos" => array:1 [
          "pt" => array:1 [
            "titulo" => "A import&#226;ncia da rela&#231;&#227;o neutr&#243;filos&#47;linf&#243;citos em doentes com miocardiopatia hipertr&#243;fica"
          ]
        ]
        "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" => "fig0005"
            "etiqueta" => "Figure 1"
            "tipo" => "MULTIMEDIAFIGURA"
            "mostrarFloat" => true
            "mostrarDisplay" => false
            "figura" => array:1 [
              0 => array:4 [
                "imagen" => "gr1.jpeg"
                "Alto" => 2439
                "Ancho" => 3314
                "Tamanyo" => 337758
              ]
            ]
            "descripcion" => array:1 [
              "en" => "<p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">Neutrophil-to-lymphocyte ratio and &#40;a&#41; fragmented QRS&#44; &#40;b&#41; ejection fraction&#44; &#40;c&#41; ventricular tachycardia&#44; &#40;d&#41; predicted five-year risk of sudden cardiac death&#44; &#40;e&#41; corrected QT&#44; and &#40;f&#41; presyncope in patients with hypertrophic cardiomyopathy&#46; fQRS&#58; fragmented QRS&#59; LVEF&#58; left ventricular ejection fraction&#59; NLR&#58; neutrophil-to-lymphocyte ratio&#59; QTc&#58; corrected QT interval&#59; SCD&#58; sudden cardiac death&#59; VT&#58; ventricular tachycardia&#46;</p>"
            ]
          ]
        ]
        "autores" => array:1 [
          0 => array:2 [
            "autoresLista" => "Sinem Ozyilmaz, Ozgur Akgul, Huseyin Uyarel, Hamdi Pusuroglu, Mehmet Gul, Muhammet Hulusi Satilmisoglu, Ismail Bolat, Isa Ozyilmaz, Hakan U&#231;ar, Aydin Yildirim, Ihsan Bakir"
            "autores" => array:11 [
              0 => array:2 [
                "nombre" => "Sinem"
                "apellidos" => "Ozyilmaz"
              ]
              1 => array:2 [
                "nombre" => "Ozgur"
                "apellidos" => "Akgul"
              ]
              2 => array:2 [
                "nombre" => "Huseyin"
                "apellidos" => "Uyarel"
              ]
              3 => array:2 [
                "nombre" => "Hamdi"
                "apellidos" => "Pusuroglu"
              ]
              4 => array:2 [
                "nombre" => "Mehmet"
                "apellidos" => "Gul"
              ]
              5 => array:2 [
                "nombre" => "Muhammet Hulusi"
                "apellidos" => "Satilmisoglu"
              ]
              6 => array:2 [
                "nombre" => "Ismail"
                "apellidos" => "Bolat"
              ]
              7 => array:2 [
                "nombre" => "Isa"
                "apellidos" => "Ozyilmaz"
              ]
              8 => array:2 [
                "nombre" => "Hakan"
                "apellidos" => "U&#231;ar"
              ]
              9 => array:2 [
                "nombre" => "Aydin"
                "apellidos" => "Yildirim"
              ]
              10 => array:2 [
                "nombre" => "Ihsan"
                "apellidos" => "Bakir"
              ]
            ]
          ]
        ]
      ]
      "idiomaDefecto" => "en"
      "Traduccion" => array:1 [
        "en" => array:9 [
          "pii" => "S2174204917300880"
          "doi" => "10.1016/j.repce.2017.04.003"
          "estado" => "S300"
          "subdocumento" => ""
          "abierto" => array:3 [
            "ES" => true
            "ES2" => true
            "LATM" => true
          ]
          "gratuito" => true
          "lecturas" => array:1 [
            "total" => 0
          ]
          "idiomaDefecto" => "en"
          "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S2174204917300880?idApp=UINPBA00004E"
        ]
      ]
      "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S0870255117301269?idApp=UINPBA00004E"
      "url" => "/08702551/0000003600000004/v1_201704060057/S0870255117301269/v1_201704060057/en/main.assets"
    ]
  ]
  "en" => array:12 [
    "idiomaDefecto" => true
    "cabecera" => "<span class="elsevierStyleTextfn">Editorial comment</span>"
    "titulo" => "Predicting risk of sudden death in hypertrophic cardiomyopathy&#58; Can additional simple markers help&#63;"
    "tieneTextoCompleto" => true
    "paginas" => array:1 [
      0 => array:2 [
        "paginaInicial" => "247"
        "paginaFinal" => "249"
      ]
    ]
    "autores" => array:1 [
      0 => array:3 [
        "autoresLista" => "Dulce Brito"
        "autores" => array:1 [
          0 => array:3 [
            "nombre" => "Dulce"
            "apellidos" => "Brito"
            "email" => array:1 [
              0 => "dulcebrito59&#64;gmail&#46;com"
            ]
          ]
        ]
        "afiliaciones" => array:1 [
          0 => array:2 [
            "entidad" => "Hospital de Santa Maria&#44; CHLN&#44; Centro Cardiovascular da Universidade de Lisboa &#40;CCUL&#41;&#44; Centro Acad&#233;mico M&#233;dico de Lisboa &#40;CAML&#41;&#44; Universidade de Lisboa&#44; Lisboa&#44; Portugal"
            "identificador" => "aff0005"
          ]
        ]
      ]
    ]
    "titulosAlternativos" => array:1 [
      "pt" => array:1 [
        "titulo" => "Previs&#227;o de risco de morte s&#250;bita na miocardiopatia hipertr&#243;fica&#58; poder&#227;o marcadores simples adicionais constituir uma ajuda&#63;"
      ]
    ]
    "textoCompleto" => "<span class="elsevierStyleSections"><p id="par0005" class="elsevierStylePara elsevierViewall">Hypertrophic cardiomyopathy &#40;HCM&#41; is a common genetic cardiovascular disorder&#44; of which sudden cardiac death &#40;SCD&#41; is the most feared potential manifestation&#46; Risk stratification for SCD has always been one of the greatest challenges in the management of the disease&#46;</p><p id="par0010" class="elsevierStylePara elsevierViewall">Malignant ventricular arrhythmias are possibly the most common cause of SCD in HCM&#44; although there are other potential causes&#44; and in fact the pathophysiologic mechanisms leading to syncope and SCD in HCM are not completely understood&#46; Myocyte disarray&#44; cardiac hypertrophy&#44; small-vessel coronary artery disease&#44; and increased interstitial fibrosis are consistently found in the disease&#44;<a class="elsevierStyleCrossRef" href="#bib0110"><span class="elsevierStyleSup">1</span></a> and unquestionably play a role in the risk of SCD&#44; although possibly to different and varying degrees in individual patients&#44; depending also on the underlying genetic sarcomere alteration and tempered by additional genetic and external factors&#46; The disease substrate contributes to functional endothelial and myocardial impairment&#44; malignant arrhythmias&#44; myocardial remodeling&#44; and autonomic dysfunction&#44; all of which can trigger sudden death under the appropriate circumstances&#46; Translated into the clinical scenario&#44; non-sustained ventricular tachycardia episodes&#44; unexplained non-vasovagal syncope &#40;particularly in young patients&#41;&#44; abnormal blood pressure response to exercise&#44; left ventricular outflow obstruction&#44; degree of hypertrophy&#44; and progression to chamber dilatation&#44; are some of the known identifiable potential risk factors for the occurrence of SCD&#46; Several of these clinical signs are included in the prognostic index currently recommended for application to HCM patients&#44;<a class="elsevierStyleCrossRef" href="#bib0115"><span class="elsevierStyleSup">2</span></a> a risk prediction model that estimates individual five-year risk of SCD&#46; Age at diagnosis and a family history of sudden death are other risk factors incorporated in the model&#46; The strategy currently used&#44; although validated&#44;<a class="elsevierStyleCrossRef" href="#bib0120"><span class="elsevierStyleSup">3</span></a> is not without its critics&#46;<a class="elsevierStyleCrossRef" href="#bib0125"><span class="elsevierStyleSup">4</span></a> In fact&#44; in such a complex disease&#44; there will never be a perfect strategy to accurately predict the risk of SCD&#46;</p><p id="par0015" class="elsevierStylePara elsevierViewall">Besides clinical and imaging-derived risk factors&#44; an ideal biomarker for risk stratification in HCM would be one that could easily&#44; accurately and cost-effectively help identify HCM patients at higher risk for cardiovascular events &#40;including SCD&#41;&#44; and would be better than or at least additive to already identified biomarkers for determining prognosis and in decision-making processes&#46;</p><p id="par0020" class="elsevierStylePara elsevierViewall">Several biomarkers &#8211; considered here in a strict sense as biochemical molecules &#8211; have been studied in HCM&#44; including some involved in inflammatory&#44; hypertrophic and fibrosis signaling pathways&#46;<a class="elsevierStyleCrossRefs" href="#bib0130"><span class="elsevierStyleSup">5&#44;6</span></a> However&#44; only natriuretic peptides &#40;NPs&#41; &#8211; wall stress markers &#8211; have been reproducibly associated with symptoms of heart failure&#44; severity of hypertrophy&#44; cardiac remodeling and imaging signs of left ventricular dysfunction&#46;<a class="elsevierStyleCrossRefs" href="#bib0130"><span class="elsevierStyleSup">5&#8211;7</span></a> High levels of NPs are also associated with the presence of fibrosis in cardiac magnetic resonance imaging of patients with symptomatic ventricular arrhythmias&#46; However&#44; although the utility of late gadolinium enhancement for detecting myocardial fibrosis is well established&#44; current data do not support its use in prediction of SCD risk&#46;<a class="elsevierStyleCrossRefs" href="#bib0115"><span class="elsevierStyleSup">2&#44;8</span></a> Regarding prognosis&#44; plasma NP levels are independent predictors of morbidity and mortality&#44; particularly with regard to heart failure-related events&#44; but not to SCD&#46;<a class="elsevierStyleCrossRefs" href="#bib0150"><span class="elsevierStyleSup">9&#8211;11</span></a></p><p id="par0025" class="elsevierStylePara elsevierViewall">Inflammation plays a central role in the pathogenesis of many clinical conditions&#46; Interleukin-6 &#40;IL-6&#41; and tumor necrosis factor &#40;TNF-&#945;&#41; are the inflammatory biomarkers most studied in HCM patients&#46; IL-6&#44; a pro-inflammatory cytokine that regulates leukocyte activity&#44; is secreted by all the nucleated cells of the heart and also by skeletal muscle&#46; Its levels are elevated in HCM patients&#44; although no correlation with left ventricular hypertrophy or function has been found&#46;<a class="elsevierStyleCrossRefs" href="#bib0130"><span class="elsevierStyleSup">5&#44;12&#44;13</span></a> TNF-&#945; &#40;cachexin&#41;&#44; a cytokine involved in systemic inflammation whose levels are generally found to be increased in HCM&#44;<a class="elsevierStyleCrossRef" href="#bib0130"><span class="elsevierStyleSup">5</span></a> is produced not only by activated macrophages but also by many other cell types&#46; Its primary role is in the regulation of immune cells&#46; It has diverse actions on various organ systems&#44; generally together with interleukin-1 and IL-6&#46; Both biomarkers &#40;TNF-&#945; and IL-6&#41; may promote the development of cardiac hypertrophy and fibrosis&#44; through the activation of matrix metalloproteinases and their tissue inhibitors&#44; and may have a role in the pathogenesis of HCM&#44; although by as yet unidentified mechanisms&#46;<a class="elsevierStyleCrossRefs" href="#bib0130"><span class="elsevierStyleSup">5&#44;12&#44;13</span></a></p><p id="par0030" class="elsevierStylePara elsevierViewall">In the study by Ozyilmaz et al&#46; published in this issue of the <span class="elsevierStyleItalic">Journal</span>&#44;<a class="elsevierStyleCrossRef" href="#bib0210"><span class="elsevierStyleSup">21</span></a> the authors studied another marker of inflammation&#44; the neutrophil-to-lymphocyte ratio &#40;NLR&#41;&#44; in a population of 97 patients with HCM followed for three years&#44; and analyzed the association of NLR with prognosis&#46; They found higher NLR in patients than in controls&#44; and higher NLR values were identified in patients with fragmented QRS&#44; ventricular tachycardia&#44; pre-syncope&#44; longer QTc interval &#40;&#62;440 ms&#41;&#44; and &#62;6&#37; predicted five-year risk of SCD&#46; Correlation was found only between QTC duration and NLR&#46;</p><p id="par0035" class="elsevierStylePara elsevierViewall">The authors linked higher NLR values to high-risk patients &#40;with a worse prognosis regarding ventricular arrhythmic events&#41;&#44; indicating a possible need for closer monitoring for ventricular arrhythmias in patients with high NLR&#46;</p><p id="par0040" class="elsevierStylePara elsevierViewall">NLR can be altered in diverse clinical conditions and may predict cardiovascular mortality&#44;<a class="elsevierStyleCrossRef" href="#bib0175"><span class="elsevierStyleSup">14</span></a> and has emerged as a strong marker of an adverse prognosis&#44; including in acute coronary syndromes<a class="elsevierStyleCrossRefs" href="#bib0180"><span class="elsevierStyleSup">15&#8211;18</span></a> and in acute decompensated heart failure&#46;<a class="elsevierStyleCrossRef" href="#bib0200"><span class="elsevierStyleSup">19</span></a> In fact NLR may be a predictor of mortality in all conditions&#44;<a class="elsevierStyleCrossRef" href="#bib0205"><span class="elsevierStyleSup">20</span></a> since it is potentially affected in a large number of diverse situations&#44; including hypertension&#44; diabetes mellitus&#44; heart disease&#44; thyroid&#44; renal and hepatic dysfunction&#44; cancer&#44; local or systemic infection&#44; inflammatory disease&#44; and medication with various drugs&#46;<a class="elsevierStyleCrossRef" href="#bib0205"><span class="elsevierStyleSup">20</span></a> It should be noted that some &#40;but not all&#41; of these conditions were excluded from the study by Ozyilmaz et al&#46;<a class="elsevierStyleCrossRef" href="#bib0210"><span class="elsevierStyleSup">21</span></a> It may not always be possible to exclude all potential confounders&#44; because a &#8216;pure&#8217; middle-aged HCM population probably does not exist&#46; However&#44; the effects of the aforementioned potential confounders on NLR levels should be taken into account when assessing the application of a new biomarker of SCD risk in HCM that may impact on the decision whether to implant an implantable cardioverter-defibrillator&#46;</p><p id="par0045" class="elsevierStylePara elsevierViewall">The role of chronic inflammation and reparative fibrosis predisposing to ventricular &#40;and possibly atrial&#41; arrhythmias and remodeling in HCM is yet to be demonstrated&#46; It is not known whether inflammation and cardiac repair &#40;fibrosis&#41; in the disease is actually responsible for both increased NLR values and QRS prolongation&#44; which would explain the association found by Ozyilmaz et al&#46;<a class="elsevierStyleCrossRef" href="#bib0210"><span class="elsevierStyleSup">21</span></a> Furthermore&#44; genetic characterization is an important marker of HCM&#44; and it would be interesting to assess in future studies whether different genetic populations with HCM &#8211; associated with mutations in the same or different sarcomere genes &#8211; behave similarly or differently regarding NLR values&#46;</p><p id="par0050" class="elsevierStylePara elsevierViewall">It is possible that as a marker of prognosis &#8211; or index of frailty&#63; &#8211; in many situations&#44; NLR&#44; although non-specific&#44; may be also useful in HCM&#44; and the work by Ozyilmaz et al&#46; encourages us to keep an open mind regarding new possibilities of risk stratification in HCM&#46;</p><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0005">Conflicts of interest</span><p id="par0055" class="elsevierStylePara elsevierViewall">The author has no conflicts of interest to declare&#46;</p></span></span>"
    "textoCompletoSecciones" => array:1 [
      "secciones" => array:2 [
        0 => array:2 [
          "identificador" => "sec0005"
          "titulo" => "Conflicts of interest"
        ]
        1 => array:1 [
          "titulo" => "References"
        ]
      ]
    ]
    "pdfFichero" => "main.pdf"
    "tienePdf" => true
    "bibliografia" => array:2 [
      "titulo" => "References"
      "seccion" => array:1 [
        0 => array:2 [
          "identificador" => "bibs0005"
          "bibliografiaReferencia" => array:21 [
            0 => array:3 [
              "identificador" => "bib0110"
              "etiqueta" => "1"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Hypertrophic cardiomyopathy&#58; the interrelation of disarray&#44; fibrosis&#44; and small vessel disease"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:3 [
                            0 => "A&#46;M&#46; Varnava"
                            1 => "P&#46;M&#46; Elliott"
                            2 => "S&#46; Sharma"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Heart"
                        "fecha" => "2000"
                        "volumen" => "84"
                        "paginaInicial" => "476"
                        "paginaFinal" => "482"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/11040002"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            1 => array:3 [
              "identificador" => "bib0115"
              "etiqueta" => "2"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "2014 ESC Guidelines on diagnosis and management of hypertrophic cardiomyopathy&#58; The Task Force for the Diagnosis and Management of Hypertrophic Cardiomyopathy of the European Society of Cardiology &#40;ESC&#41;"
                      "autores" => array:1 [
                        0 => array:3 [
                          "colaboracion" => "Authors&#47;Task Force members"
                          "etal" => true
                          "autores" => array:3 [
                            0 => "P&#46;M&#46; Elliott"
                            1 => "A&#46; Anastasakis"
                            2 => "M&#46;A&#46; Borger"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1093/eurheartj/ehu284"
                      "Revista" => array:6 [
                        "tituloSerie" => "Eur Heart J"
                        "fecha" => "2014"
                        "volumen" => "35"
                        "paginaInicial" => "2733"
                        "paginaFinal" => "2779"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/25173338"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            2 => array:3 [
              "identificador" => "bib0120"
              "etiqueta" => "3"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "A novel clinical risk prediction model for sudden cardiac death in hypertrophic cardiomyopathy &#40;HCM risk-SCD&#41;"
                      "autores" => array:1 [
                        0 => array:3 [
                          "colaboracion" => "Hypertrophic Cardiomyopathy Outcomes Investigators"
                          "etal" => true
                          "autores" => array:3 [
                            0 => "C&#46; O&#8217;Mahony"
                            1 => "F&#46; Jichi"
                            2 => "M&#46; Pavlou"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1093/eurheartj/eht439"
                      "Revista" => array:6 [
                        "tituloSerie" => "Eur Heart J"
                        "fecha" => "2014"
                        "volumen" => "35"
                        "paginaInicial" => "2010"
                        "paginaFinal" => "2020"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/24126876"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            3 => array:3 [
              "identificador" => "bib0125"
              "etiqueta" => "4"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Independent assessment of the European Society of Cardiology sudden death risk model for hypertrophic cardiomyopathy"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:3 [
                            0 => "B&#46;J&#46; Maron"
                            1 => "S&#46;A&#46; Casey"
                            2 => "R&#46;H&#46; Chan"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1016/j.amjcard.2015.05.047"
                      "Revista" => array:6 [
                        "tituloSerie" => "Am J Cardiol"
                        "fecha" => "2015"
                        "volumen" => "116"
                        "paginaInicial" => "757"
                        "paginaFinal" => "764"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/26183790"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            4 => array:3 [
              "identificador" => "bib0130"
              "etiqueta" => "5"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Biomarkers of pathophysiology in hypertrophic cardiomyopathy&#58; implications for clinical management and prognosis"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:3 [
                            0 => "F&#46; Cambronero"
                            1 => "F&#46; Mar&#237;n"
                            2 => "V&#46; Rold&#225;n"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1093/eurheartj/ehn538"
                      "Revista" => array:6 [
                        "tituloSerie" => "Eur Heart J"
                        "fecha" => "2009"
                        "volumen" => "30"
                        "paginaInicial" => "139"
                        "paginaFinal" => "151"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/19136482"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            5 => array:3 [
              "identificador" => "bib0135"
              "etiqueta" => "6"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Biomarkers in cardiology &#8211; part 1 &#8211; in heart failure and specific cardiomyopathies"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:1 [
                            0 => "EXpert Group on Biomarkers"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.5935/abc.20140184"
                      "Revista" => array:6 [
                        "tituloSerie" => "Arq Bras Cardiol"
                        "fecha" => "2014"
                        "volumen" => "103"
                        "paginaInicial" => "451"
                        "paginaFinal" => "459"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/25590924"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            6 => array:3 [
              "identificador" => "bib0140"
              "etiqueta" => "7"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Plasma N-terminal probrain natriuretic peptide&#58; a marker of left ventricular hypertrophy in hypertrophic cardiomyopathy"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:3 [
                            0 => "D&#46; Brito"
                            1 => "J&#46;S&#46; Matias"
                            2 => "L&#46; Sargento"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Rev Port Cardiol"
                        "fecha" => "2004"
                        "volumen" => "23"
                        "paginaInicial" => "1557"
                        "paginaFinal" => "1582"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/15732658"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            7 => array:3 [
              "identificador" => "bib0145"
              "etiqueta" => "8"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Prognostic value of late gadolinium enhancement in clinical outcomes for hypertrophic cardiomyopathy"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:3 [
                            0 => "J&#46;J&#46; Green"
                            1 => "J&#46;S&#46; Berger"
                            2 => "C&#46;M&#46; Kramer"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1016/j.jcmg.2011.11.021"
                      "Revista" => array:6 [
                        "tituloSerie" => "JACC Cardiovasc Imaging"
                        "fecha" => "2012"
                        "volumen" => "5"
                        "paginaInicial" => "370"
                        "paginaFinal" => "377"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/22498326"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            8 => array:3 [
              "identificador" => "bib0150"
              "etiqueta" => "9"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Tissue Doppler imaging and plasma BNP levels to assess the prognosis in patients with hypertrophic cardiomyopathy"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:3 [
                            0 => "H&#46; Kitaoka"
                            1 => "T&#46; Kubo"
                            2 => "M&#46; Okawa"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1016/j.echo.2011.05.009"
                      "Revista" => array:6 [
                        "tituloSerie" => "J Am Soc Echocardiogr"
                        "fecha" => "2011"
                        "volumen" => "24"
                        "paginaInicial" => "1020"
                        "paginaFinal" => "1025"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/21684113"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            9 => array:3 [
              "identificador" => "bib0155"
              "etiqueta" => "10"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Prognostic value of N-terminal pro-brain natriuretic peptide in outpatients with hypertrophic cardiomyopathy"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:3 [
                            0 => "R&#46; D&#8217;Amato"
                            1 => "B&#46; Tomberli"
                            2 => "E&#46; Servettini"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:5 [
                        "tituloSerie" => "Am J Cardiol"
                        "fecha" => "2013"
                        "volumen" => "12"
                        "paginaInicial" => "1190"
                        "paginaFinal" => "1196"
                      ]
                    ]
                  ]
                ]
              ]
            ]
            10 => array:3 [
              "identificador" => "bib0160"
              "etiqueta" => "11"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Relation between serum N-terminal pro-brain natriuretic peptide and prognosis in patients with hypertrophic cardiomyopathy"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:3 [
                            0 => "C&#46;J&#46; Coats"
                            1 => "M&#46;J&#46; Gallagher"
                            2 => "M&#46; Foley"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1093/eurheartj/eht070"
                      "Revista" => array:6 [
                        "tituloSerie" => "Eur Heart J"
                        "fecha" => "2013"
                        "volumen" => "34"
                        "paginaInicial" => "2529"
                        "paginaFinal" => "2537"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/23455360"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            11 => array:3 [
              "identificador" => "bib0165"
              "etiqueta" => "12"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Variants of trophic factors and expression of cardiac hypertrophy in patients with hypertrophic cardiomyopathy"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:3 [
                            0 => "R&#46; Patel"
                            1 => "D&#46;-S&#46; Lim"
                            2 => "D&#46; Reddy"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1006/jmcc.2000.1267"
                      "Revista" => array:6 [
                        "tituloSerie" => "J Mol Cell Cardiol"
                        "fecha" => "2000"
                        "volumen" => "32"
                        "paginaInicial" => "2369"
                        "paginaFinal" => "2377"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/11113012"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            12 => array:3 [
              "identificador" => "bib0170"
              "etiqueta" => "13"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Comparison of circulating levels of interleukin-6 and tumor necrosis factor-alpha in hypertrophic cardiomyopathy and in idiopathic dilated cardiomyopathy"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:3 [
                            0 => "M&#46; Hogye"
                            1 => "Y&#46; Mandi"
                            2 => "M&#46; Csanady"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:5 [
                        "tituloSerie" => "Am J Cardiol"
                        "fecha" => "2004"
                        "volumen" => "84"
                        "paginaInicial" => "249"
                        "paginaFinal" => "251"
                      ]
                    ]
                  ]
                ]
              ]
            ]
            13 => array:3 [
              "identificador" => "bib0175"
              "etiqueta" => "14"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Neutrophil to lymphocyte ratio and cardiovascular diseases&#58; a review"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:3 [
                            0 => "T&#46; Bhat"
                            1 => "S&#46; Teli"
                            2 => "J&#46; Rijal"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1586/erc.12.159"
                      "Revista" => array:6 [
                        "tituloSerie" => "Expert Rev Cardiovasc Ther"
                        "fecha" => "2013"
                        "volumen" => "11"
                        "paginaInicial" => "55"
                        "paginaFinal" => "59"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/23259445"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            14 => array:3 [
              "identificador" => "bib0180"
              "etiqueta" => "15"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Usefulness of an elevated neutrophil to lymphocyte ratio in predicting long-term mortality after percutaneous coronary intervention"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:3 [
                            0 => "B&#46;K&#46; Duffy"
                            1 => "H&#46;S&#46; Gurm"
                            2 => "V&#46; Rajagopal"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1016/j.amjcard.2005.10.034"
                      "Revista" => array:6 [
                        "tituloSerie" => "Am J Cardiol"
                        "fecha" => "2006"
                        "volumen" => "97"
                        "paginaInicial" => "993"
                        "paginaFinal" => "996"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/16563903"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            15 => array:3 [
              "identificador" => "bib0185"
              "etiqueta" => "16"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Usefulness of the neutrophil to lymphocyte ratio in predicting long-term mortality in ST segment elevation myocardial infarction"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:3 [
                            0 => "J&#46; N&#250;&#241;ez"
                            1 => "E&#46; N&#250;&#241;ez"
                            2 => "V&#46; Bod&#237;"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1016/j.amjcard.2007.11.004"
                      "Revista" => array:6 [
                        "tituloSerie" => "Am J Cardiol"
                        "fecha" => "2008"
                        "volumen" => "101"
                        "paginaInicial" => "747"
                        "paginaFinal" => "752"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/18328833"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            16 => array:3 [
              "identificador" => "bib0190"
              "etiqueta" => "17"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Association between admission neutrophil to lymphocyte ratio and outcomes in patients with acute coronary syndrome"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:3 [
                            0 => "U&#46;U&#46; Tamhane"
                            1 => "S&#46; Aneja"
                            2 => "D&#46; Montgomery"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1016/j.amjcard.2008.05.006"
                      "Revista" => array:6 [
                        "tituloSerie" => "Am J Cardiol"
                        "fecha" => "2008"
                        "volumen" => "102"
                        "paginaInicial" => "653"
                        "paginaFinal" => "657"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/18773982"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            17 => array:3 [
              "identificador" => "bib0195"
              "etiqueta" => "18"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Neutrophil lymphocyte ratio significantly improves the Framingham risk score in prediction of coronary heart disease mortality&#58; insights from the National Health and Nutrition Examination Survey-III"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:3 [
                            0 => "N&#46; Shah"
                            1 => "V&#46; Parikh"
                            2 => "N&#46; Patel"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1016/j.ijcard.2013.12.019"
                      "Revista" => array:6 [
                        "tituloSerie" => "Int J Cardiol"
                        "fecha" => "2014"
                        "volumen" => "171"
                        "paginaInicial" => "390"
                        "paginaFinal" => "397"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/24388541"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            18 => array:3 [
              "identificador" => "bib0200"
              "etiqueta" => "19"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Utility of the neutrophil to lymphocyte ratio in predicting long-term outcomes in acute decompensated heart failure"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:3 [
                            0 => "S&#46; Uthamalingam"
                            1 => "E&#46;A&#46; Patvardhan"
                            2 => "S&#46; Subramanian"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1016/j.amjcard.2010.09.039"
                      "Revista" => array:6 [
                        "tituloSerie" => "Am J Cardiol"
                        "fecha" => "2011"
                        "volumen" => "107"
                        "paginaInicial" => "433"
                        "paginaFinal" => "438"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/21257011"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            19 => array:3 [
              "identificador" => "bib0205"
              "etiqueta" => "20"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Neutrophil to lymphocyte ratio may be predict of mortality in all conditions"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:3 [
                            0 => "S&#46; Balta"
                            1 => "S&#46; Demirkol"
                            2 => "M&#46; Unlu"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1038/bjc.2013.598"
                      "Revista" => array:6 [
                        "tituloSerie" => "Br J Cancer"
                        "fecha" => "2013"
                        "volumen" => "109"
                        "paginaInicial" => "3125"
                        "paginaFinal" => "3126"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/24084765"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            20 => array:3 [
              "identificador" => "bib0210"
              "etiqueta" => "21"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "The importance of the neutrophil-to-lymphocyte ratio in patients with hypertrophic cardiomyopathy"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:3 [
                            0 => "S&#46; Ozyilmaz"
                            1 => "A&#46; Ozgur"
                            2 => "H&#46; Uyarel"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:5 [
                        "tituloSerie" => "Rev Port Cardiol"
                        "fecha" => "2017"
                        "volumen" => "36"
                        "paginaInicial" => "239"
                        "paginaFinal" => "246"
                      ]
                    ]
                  ]
                ]
              ]
            ]
          ]
        ]
      ]
    ]
  ]
  "idiomaDefecto" => "en"
  "url" => "/08702551/0000003600000004/v1_201704060057/S0870255117301415/v1_201704060057/en/main.assets"
  "Apartado" => array:4 [
    "identificador" => "29261"
    "tipo" => "SECCION"
    "en" => array:2 [
      "titulo" => "Artigos Originais"
      "idiomaDefecto" => true
    ]
    "idiomaDefecto" => "en"
  ]
  "PDF" => "https://static.elsevier.es/multimedia/08702551/0000003600000004/v1_201704060057/S0870255117301415/v1_201704060057/en/main.pdf?idApp=UINPBA00004E&text.app=https://revportcardiol.org/"
  "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S0870255117301415?idApp=UINPBA00004E"
]
Partilhar
Informação da revista
Vol. 36. Núm. 4.
Páginas 247-249 (abril 2017)
Partilhar
Partilhar
Baixar PDF
Mais opções do artigo
Vol. 36. Núm. 4.
Páginas 247-249 (abril 2017)
Editorial comment
Open Access
Predicting risk of sudden death in hypertrophic cardiomyopathy: Can additional simple markers help?
Previsão de risco de morte súbita na miocardiopatia hipertrófica: poderão marcadores simples adicionais constituir uma ajuda?
Visitas
5889
Dulce Brito
Hospital de Santa Maria, CHLN, Centro Cardiovascular da Universidade de Lisboa (CCUL), Centro Académico Médico de Lisboa (CAML), Universidade de Lisboa, Lisboa, Portugal
Conteúdo relacionado
Sinem Ozyilmaz, Ozgur Akgul, Huseyin Uyarel, Hamdi Pusuroglu, Mehmet Gul, Muhammet Hulusi Satilmisoglu, Ismail Bolat, Isa Ozyilmaz, Hakan Uçar, Aydin Yildirim, Ihsan Bakir
Este item recebeu

Under a Creative Commons license
Informação do artigo
Texto Completo
Bibliografia
Baixar PDF
Estatísticas
Texto Completo

Hypertrophic cardiomyopathy (HCM) is a common genetic cardiovascular disorder, of which sudden cardiac death (SCD) is the most feared potential manifestation. Risk stratification for SCD has always been one of the greatest challenges in the management of the disease.

Malignant ventricular arrhythmias are possibly the most common cause of SCD in HCM, although there are other potential causes, and in fact the pathophysiologic mechanisms leading to syncope and SCD in HCM are not completely understood. Myocyte disarray, cardiac hypertrophy, small-vessel coronary artery disease, and increased interstitial fibrosis are consistently found in the disease,1 and unquestionably play a role in the risk of SCD, although possibly to different and varying degrees in individual patients, depending also on the underlying genetic sarcomere alteration and tempered by additional genetic and external factors. The disease substrate contributes to functional endothelial and myocardial impairment, malignant arrhythmias, myocardial remodeling, and autonomic dysfunction, all of which can trigger sudden death under the appropriate circumstances. Translated into the clinical scenario, non-sustained ventricular tachycardia episodes, unexplained non-vasovagal syncope (particularly in young patients), abnormal blood pressure response to exercise, left ventricular outflow obstruction, degree of hypertrophy, and progression to chamber dilatation, are some of the known identifiable potential risk factors for the occurrence of SCD. Several of these clinical signs are included in the prognostic index currently recommended for application to HCM patients,2 a risk prediction model that estimates individual five-year risk of SCD. Age at diagnosis and a family history of sudden death are other risk factors incorporated in the model. The strategy currently used, although validated,3 is not without its critics.4 In fact, in such a complex disease, there will never be a perfect strategy to accurately predict the risk of SCD.

Besides clinical and imaging-derived risk factors, an ideal biomarker for risk stratification in HCM would be one that could easily, accurately and cost-effectively help identify HCM patients at higher risk for cardiovascular events (including SCD), and would be better than or at least additive to already identified biomarkers for determining prognosis and in decision-making processes.

Several biomarkers – considered here in a strict sense as biochemical molecules – have been studied in HCM, including some involved in inflammatory, hypertrophic and fibrosis signaling pathways.5,6 However, only natriuretic peptides (NPs) – wall stress markers – have been reproducibly associated with symptoms of heart failure, severity of hypertrophy, cardiac remodeling and imaging signs of left ventricular dysfunction.5–7 High levels of NPs are also associated with the presence of fibrosis in cardiac magnetic resonance imaging of patients with symptomatic ventricular arrhythmias. However, although the utility of late gadolinium enhancement for detecting myocardial fibrosis is well established, current data do not support its use in prediction of SCD risk.2,8 Regarding prognosis, plasma NP levels are independent predictors of morbidity and mortality, particularly with regard to heart failure-related events, but not to SCD.9–11

Inflammation plays a central role in the pathogenesis of many clinical conditions. Interleukin-6 (IL-6) and tumor necrosis factor (TNF-α) are the inflammatory biomarkers most studied in HCM patients. IL-6, a pro-inflammatory cytokine that regulates leukocyte activity, is secreted by all the nucleated cells of the heart and also by skeletal muscle. Its levels are elevated in HCM patients, although no correlation with left ventricular hypertrophy or function has been found.5,12,13 TNF-α (cachexin), a cytokine involved in systemic inflammation whose levels are generally found to be increased in HCM,5 is produced not only by activated macrophages but also by many other cell types. Its primary role is in the regulation of immune cells. It has diverse actions on various organ systems, generally together with interleukin-1 and IL-6. Both biomarkers (TNF-α and IL-6) may promote the development of cardiac hypertrophy and fibrosis, through the activation of matrix metalloproteinases and their tissue inhibitors, and may have a role in the pathogenesis of HCM, although by as yet unidentified mechanisms.5,12,13

In the study by Ozyilmaz et al. published in this issue of the Journal,21 the authors studied another marker of inflammation, the neutrophil-to-lymphocyte ratio (NLR), in a population of 97 patients with HCM followed for three years, and analyzed the association of NLR with prognosis. They found higher NLR in patients than in controls, and higher NLR values were identified in patients with fragmented QRS, ventricular tachycardia, pre-syncope, longer QTc interval (>440 ms), and >6% predicted five-year risk of SCD. Correlation was found only between QTC duration and NLR.

The authors linked higher NLR values to high-risk patients (with a worse prognosis regarding ventricular arrhythmic events), indicating a possible need for closer monitoring for ventricular arrhythmias in patients with high NLR.

NLR can be altered in diverse clinical conditions and may predict cardiovascular mortality,14 and has emerged as a strong marker of an adverse prognosis, including in acute coronary syndromes15–18 and in acute decompensated heart failure.19 In fact NLR may be a predictor of mortality in all conditions,20 since it is potentially affected in a large number of diverse situations, including hypertension, diabetes mellitus, heart disease, thyroid, renal and hepatic dysfunction, cancer, local or systemic infection, inflammatory disease, and medication with various drugs.20 It should be noted that some (but not all) of these conditions were excluded from the study by Ozyilmaz et al.21 It may not always be possible to exclude all potential confounders, because a ‘pure’ middle-aged HCM population probably does not exist. However, the effects of the aforementioned potential confounders on NLR levels should be taken into account when assessing the application of a new biomarker of SCD risk in HCM that may impact on the decision whether to implant an implantable cardioverter-defibrillator.

The role of chronic inflammation and reparative fibrosis predisposing to ventricular (and possibly atrial) arrhythmias and remodeling in HCM is yet to be demonstrated. It is not known whether inflammation and cardiac repair (fibrosis) in the disease is actually responsible for both increased NLR values and QRS prolongation, which would explain the association found by Ozyilmaz et al.21 Furthermore, genetic characterization is an important marker of HCM, and it would be interesting to assess in future studies whether different genetic populations with HCM – associated with mutations in the same or different sarcomere genes – behave similarly or differently regarding NLR values.

It is possible that as a marker of prognosis – or index of frailty? – in many situations, NLR, although non-specific, may be also useful in HCM, and the work by Ozyilmaz et al. encourages us to keep an open mind regarding new possibilities of risk stratification in HCM.

Conflicts of interest

The author has no conflicts of interest to declare.

References
[1]
A.M. Varnava, P.M. Elliott, S. Sharma, et al.
Hypertrophic cardiomyopathy: the interrelation of disarray, fibrosis, and small vessel disease.
Heart, 84 (2000), pp. 476-482
[2]
P.M. Elliott, A. Anastasakis, M.A. Borger, Authors/Task Force members, et al.
2014 ESC Guidelines on diagnosis and management of hypertrophic cardiomyopathy: The Task Force for the Diagnosis and Management of Hypertrophic Cardiomyopathy of the European Society of Cardiology (ESC).
Eur Heart J, 35 (2014), pp. 2733-2779
[3]
C. O’Mahony, F. Jichi, M. Pavlou, Hypertrophic Cardiomyopathy Outcomes Investigators, et al.
A novel clinical risk prediction model for sudden cardiac death in hypertrophic cardiomyopathy (HCM risk-SCD).
Eur Heart J, 35 (2014), pp. 2010-2020
[4]
B.J. Maron, S.A. Casey, R.H. Chan, et al.
Independent assessment of the European Society of Cardiology sudden death risk model for hypertrophic cardiomyopathy.
Am J Cardiol, 116 (2015), pp. 757-764
[5]
F. Cambronero, F. Marín, V. Roldán, et al.
Biomarkers of pathophysiology in hypertrophic cardiomyopathy: implications for clinical management and prognosis.
Eur Heart J, 30 (2009), pp. 139-151
[6]
EXpert Group on Biomarkers.
Biomarkers in cardiology – part 1 – in heart failure and specific cardiomyopathies.
Arq Bras Cardiol, 103 (2014), pp. 451-459
[7]
D. Brito, J.S. Matias, L. Sargento, et al.
Plasma N-terminal probrain natriuretic peptide: a marker of left ventricular hypertrophy in hypertrophic cardiomyopathy.
Rev Port Cardiol, 23 (2004), pp. 1557-1582
[8]
J.J. Green, J.S. Berger, C.M. Kramer, et al.
Prognostic value of late gadolinium enhancement in clinical outcomes for hypertrophic cardiomyopathy.
JACC Cardiovasc Imaging, 5 (2012), pp. 370-377
[9]
H. Kitaoka, T. Kubo, M. Okawa, et al.
Tissue Doppler imaging and plasma BNP levels to assess the prognosis in patients with hypertrophic cardiomyopathy.
J Am Soc Echocardiogr, 24 (2011), pp. 1020-1025
[10]
R. D’Amato, B. Tomberli, E. Servettini, et al.
Prognostic value of N-terminal pro-brain natriuretic peptide in outpatients with hypertrophic cardiomyopathy.
Am J Cardiol, 12 (2013), pp. 1190-1196
[11]
C.J. Coats, M.J. Gallagher, M. Foley, et al.
Relation between serum N-terminal pro-brain natriuretic peptide and prognosis in patients with hypertrophic cardiomyopathy.
Eur Heart J, 34 (2013), pp. 2529-2537
[12]
R. Patel, D.-S. Lim, D. Reddy, et al.
Variants of trophic factors and expression of cardiac hypertrophy in patients with hypertrophic cardiomyopathy.
J Mol Cell Cardiol, 32 (2000), pp. 2369-2377
[13]
M. Hogye, Y. Mandi, M. Csanady, et al.
Comparison of circulating levels of interleukin-6 and tumor necrosis factor-alpha in hypertrophic cardiomyopathy and in idiopathic dilated cardiomyopathy.
Am J Cardiol, 84 (2004), pp. 249-251
[14]
T. Bhat, S. Teli, J. Rijal, et al.
Neutrophil to lymphocyte ratio and cardiovascular diseases: a review.
Expert Rev Cardiovasc Ther, 11 (2013), pp. 55-59
[15]
B.K. Duffy, H.S. Gurm, V. Rajagopal, et al.
Usefulness of an elevated neutrophil to lymphocyte ratio in predicting long-term mortality after percutaneous coronary intervention.
Am J Cardiol, 97 (2006), pp. 993-996
[16]
J. Núñez, E. Núñez, V. Bodí, et al.
Usefulness of the neutrophil to lymphocyte ratio in predicting long-term mortality in ST segment elevation myocardial infarction.
Am J Cardiol, 101 (2008), pp. 747-752
[17]
U.U. Tamhane, S. Aneja, D. Montgomery, et al.
Association between admission neutrophil to lymphocyte ratio and outcomes in patients with acute coronary syndrome.
Am J Cardiol, 102 (2008), pp. 653-657
[18]
N. Shah, V. Parikh, N. Patel, et al.
Neutrophil lymphocyte ratio significantly improves the Framingham risk score in prediction of coronary heart disease mortality: insights from the National Health and Nutrition Examination Survey-III.
Int J Cardiol, 171 (2014), pp. 390-397
[19]
S. Uthamalingam, E.A. Patvardhan, S. Subramanian, et al.
Utility of the neutrophil to lymphocyte ratio in predicting long-term outcomes in acute decompensated heart failure.
Am J Cardiol, 107 (2011), pp. 433-438
[20]
S. Balta, S. Demirkol, M. Unlu, et al.
Neutrophil to lymphocyte ratio may be predict of mortality in all conditions.
Br J Cancer, 109 (2013), pp. 3125-3126
[21]
S. Ozyilmaz, A. Ozgur, H. Uyarel, et al.
The importance of the neutrophil-to-lymphocyte ratio in patients with hypertrophic cardiomyopathy.
Rev Port Cardiol, 36 (2017), pp. 239-246
Copyright © 2017. Sociedade Portuguesa de Cardiologia
Baixar PDF
Idiomas
Revista Portuguesa de Cardiologia
Opções de artigo
Ferramentas
en pt

Are you a health professional able to prescribe or dispense drugs?

Você é um profissional de saúde habilitado a prescrever ou dispensar medicamentos

Ao assinalar que é «Profissional de Saúde», declara conhecer e aceitar que a responsável pelo tratamento dos dados pessoais dos utilizadores da página de internet da Revista Portuguesa de Cardiologia (RPC), é esta entidade, com sede no Campo Grande, n.º 28, 13.º, 1700-093 Lisboa, com os telefones 217 970 685 e 217 817 630, fax 217 931 095 e com o endereço de correio eletrónico revista@spc.pt. Declaro para todos os fins, que assumo inteira responsabilidade pela veracidade e exatidão da afirmação aqui fornecida.