Cardiac resynchronization therapy in patients with New York Heart Association class I and II heart failure: an approach to 2010.
Résumé
It has been firmly established that cardiac resynchronization therapy (CRT) reduces symptoms and decreases morbidity and mortality1-6 in a subgroup of patients who remain in moderate to severe chronic heart failure (HF) (New York Heart Association [NYHA] class III/IV) despite optimal medication. These patients are characterized by wide QRS on the surface ECG as a sign of ventricular dyssynchrony and poor left ventricular (LV) systolic function with ejection fraction (LVEF) of ≤35%...
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