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Functional Classes of Heart Failure and Indications for Implantable Cardioverter-Defibrillator

      In a recently published report, Biton et al demonstrated that implantable cardioverters-defibrillators (ICDs) benefit patients with ischemic cardiomyopathy (status after myocardial infarction and decreased left ventricular ejection fraction [LVEF] ≤ 35%) across the New York Heart Association (NYHA) functional classes.
      • Biton Y.
      • Rosero S.
      • Moss A.
      • Zareba W.
      • Kutyifa V.
      • Baman J.
      • Barsheshet A.
      • McNitt S.
      • Polonsky B.
      • Goldenberg I.
      Long-term survival with implantable cardioverter-defibrillator in different symptomatic functional classes of heart failure.
      In other words, functional class does not matter when it comes to indications for ICD. This raises an important question about the relevance of NYHA class of heart failure (HF) in indications for cardiac devices.
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