Portal de Periódicos da CAPES

QRS duration variability in patients with heart failure

2002; Elsevier BV; Volume: 90; Issue: 3 Linguagem: Inglês

10.1016/s0002-9149(02)02479-7

1879-1913

Juan M. Aranda, Erik R. Carlson, Daniel Pauly, Anne B. Curtis, C Conti, Mario Ariet, James A. Hill,

Cardiac electrophysiology and arrhythmias

Published data suggest that the prognosis for patients with heart failure (HF) is worse for those with prolonged QRS duration than for those with normal QRS duration.1 Cardiac resynchronization therapy (CRT) involves the use of biventricular pacing to correct the ventricular dyssynchrony that occurs with prolonged QRS duration.2–4 For patients with HF whose QRS duration is >130 ms, CRT improves exercise tolerance and quality of life.5,6 We noticed that some patients who underwent hospitalization for decompensated HF demonstrated a prolonged QRS duration (>130 ms) that subsequently decreased several weeks later upon achieving a compensated, euvolemic state. These patients qualified for CRT during their initial hospitalization, but not when brought back for implantation of the device. This retrospective study examines the variability of QRS duration on the 12-lead electrocardiogram (ECG) in patients with and without HF.