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    "textoCompleto" => "<span class="elsevierStyleSections"><p id="par0005" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleSmallCaps">I</span> have read with great interest the article by Rodrigues et al&#46;<a class="elsevierStyleCrossRef" href="#bib0050"><span class="elsevierStyleSup">1</span></a> and the editorial comment<a class="elsevierStyleCrossRef" href="#bib0055"><span class="elsevierStyleSup">2</span></a> about the use of sacubitril&#47;valsartan in patients with systolic heart failure&#44; and <span class="elsevierStyleSmallCaps">I</span> share the same concerns about the target population of this drug&#46;</p><p id="par0010" class="elsevierStylePara elsevierViewall">In an epidemiological study in Lima&#44; Peru&#44;<a class="elsevierStyleCrossRef" href="#bib0060"><span class="elsevierStyleSup">3</span></a> of 1075 patients with heart failure&#44; 46&#37; had normal ejection fraction and only 39&#37; had heart failure with reduced ejection fraction &#40;&#8804;40&#37;&#41; &#40;HFrEF&#41;&#46; Overall&#44; 30&#37; of patients with heart failure also had chronic renal disease&#44; leaving only 20-25&#37; of patients eligible for treatment with sacubitril&#47;valsartan&#46;</p><p id="par0015" class="elsevierStylePara elsevierViewall">In a high-altitude population like Huancayo &#40;3250 meters above sea level&#41;&#44; the profile of heart failure patients is even more dissimilar&#44;<a class="elsevierStyleCrossRef" href="#bib0065"><span class="elsevierStyleSup">4</span></a> with 89&#46;9&#37; of patients having a normal ejection fraction&#44; while around 25&#37; of individuals have heart failure and chronic lung disease&#44; leaving only 2&#46;2&#37; of patients eligible for this drug&#46;</p><p id="par0020" class="elsevierStylePara elsevierViewall">Another concern is about how many patients will tolerate the target dose of 97&#47;103<span class="elsevierStyleHsp" style=""></span>mg&#44; because as Antol et al&#46;<a class="elsevierStyleCrossRef" href="#bib0070"><span class="elsevierStyleSup">5</span></a> pointed out&#44; only 17&#46;4&#37; of patients in their retrospective study could achieve this goal&#46; Despite this result&#44; the hospitalization rate&#44; symptoms and weight gain decreased in those who were treated with sacubitril&#47;valsartan&#46;</p><p id="par0025" class="elsevierStylePara elsevierViewall">In search of an answer about the profile of patients who will benefit from sacubitril&#47;valsartan&#44; the PARAGON-HF trial<a class="elsevierStyleCrossRef" href="#bib0075"><span class="elsevierStyleSup">6</span></a> is currently under way and will try to determine if the drug is useful for patients with preserved ejection fraction &#40;HFpEF&#41;&#46; Caution must be exercised because drugs used for HFrEF that showed promise for HFpEF did not improve prognosis for this condition when tested in large clinical trials&#46;<a class="elsevierStyleCrossRefs" href="#bib0080"><span class="elsevierStyleSup">7&#8211;9</span></a></p><p id="par0030" class="elsevierStylePara elsevierViewall">As Ricardo Fontes-Carvalho pointed out in his editorial comment&#44;<a class="elsevierStyleCrossRef" href="#bib0055"><span class="elsevierStyleSup">2</span></a> we must recognize that sacubitril&#47;valsartan is an important advance for heart failure therapy&#44; even though its benefits have not been proved in a broader&#44; real-world heart failure population&#46; Taking this into account&#44; new drugs are needed for patients with heart failure who have chronic renal or pulmonary conditions or have normal or intermediate ejection fraction&#46;</p><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0005">Conflicts of interest</span><p id="par0035" class="elsevierStylePara elsevierViewall">The author has no conflicts of interest to declare&#46;</p></span></span>"
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Vol. 38. Issue 2.
Pages 163 (February 2019)
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Vol. 38. Issue 2.
Pages 163 (February 2019)
Letter to the Editor
Open Access
The PARADIGM-HF population may be very different from real-world heart failure patients
A população do PARADIGM-HF pode ser muito diferente do mundo real dos pacientes com insuficiência cardíaca
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Walter Calderón-Gersteina,b
a Hospital Nacional “Ramiro Prialé Prialé”, Internal Medicine Service, Huancayo, Essalud, Peru
b Univesidad Continental, Huancayo, Peru
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I have read with great interest the article by Rodrigues et al.1 and the editorial comment2 about the use of sacubitril/valsartan in patients with systolic heart failure, and I share the same concerns about the target population of this drug.

In an epidemiological study in Lima, Peru,3 of 1075 patients with heart failure, 46% had normal ejection fraction and only 39% had heart failure with reduced ejection fraction (≤40%) (HFrEF). Overall, 30% of patients with heart failure also had chronic renal disease, leaving only 20-25% of patients eligible for treatment with sacubitril/valsartan.

In a high-altitude population like Huancayo (3250 meters above sea level), the profile of heart failure patients is even more dissimilar,4 with 89.9% of patients having a normal ejection fraction, while around 25% of individuals have heart failure and chronic lung disease, leaving only 2.2% of patients eligible for this drug.

Another concern is about how many patients will tolerate the target dose of 97/103mg, because as Antol et al.5 pointed out, only 17.4% of patients in their retrospective study could achieve this goal. Despite this result, the hospitalization rate, symptoms and weight gain decreased in those who were treated with sacubitril/valsartan.

In search of an answer about the profile of patients who will benefit from sacubitril/valsartan, the PARAGON-HF trial6 is currently under way and will try to determine if the drug is useful for patients with preserved ejection fraction (HFpEF). Caution must be exercised because drugs used for HFrEF that showed promise for HFpEF did not improve prognosis for this condition when tested in large clinical trials.7–9

As Ricardo Fontes-Carvalho pointed out in his editorial comment,2 we must recognize that sacubitril/valsartan is an important advance for heart failure therapy, even though its benefits have not been proved in a broader, real-world heart failure population. Taking this into account, new drugs are needed for patients with heart failure who have chronic renal or pulmonary conditions or have normal or intermediate ejection fraction.

Conflicts of interest

The author has no conflicts of interest to declare.

References
[1]
G. Rodrigues, A. Tralhão, C. Aguiar, et al.
Será a coorte do PARADIGM-HF representativa da população do mundo real de doentes com insuficiência cardíaca?.
Rev Port Cardiol, 37 (2018), pp. 491-496
[2]
R. Fontes-Carvalho.
Sacubitril-valsartan in the real world: from theory to clinical practice.
Rev Port Cardiol, 37 (2018), pp. 497-498
[3]
M. Pariona, P. Segura Saldaña, M. Padilla Reyes, et al.
Epidemiological clinical characteristics of acute cardiac insufficiency in a tertiary hospital in Lima, Perú.
Rev Peru Med Exp Salud Pública, 34 (2017), pp. 655-659
[4]
W. Calderón, O. Contreras, V. Munive.
Diastolic heart failure: most common type of heart insufficiency in high-altitude residents.
Rev Soc Per Med Int, 19 (2006), pp. 19-26
[5]
D. Antol, A. Casebeer, R. DeClue, et al.
An early view of real-world patient response to sacubitril/valsartan: a retrospective study of patients with heart failure with reduced ejection fraction.
Adv Ther, 35 (2018), pp. 785-795
[6]
J. Joly, A. Desai.
Sacubitril/valsartan: from clinical trials to real-world experience.
Curr Treat Options Cardiovasc Med, 20 (2018), pp. 45
[7]
B. Massie, P. Carson, J. McMurray, et al.
Irbesartan in patients with heart failure and preserved ejection fraction.
N Engl J Med, 359 (2008), pp. 2456-2467
[8]
K. Yamamoto, H. Origasa, M. Hori, et al.
Effects of carvedilol on heart failure with preserved ejection fraction: the Japanese Diastolic Heart Failure Study (J-DHF).
Eur J Heart Fail, 15 (2013), pp. 110-118
[9]
B. Upadhya, M.J. Haykowsky, D.W. Kitzman.
Therapy for heart failure with preserved ejection fraction: current status, unique challenges, and future directions.
Copyright © 2019. Sociedade Portuguesa de Cardiologia
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