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Left bundle branch block (LBBB) and dominant R wave in lead V1 (RV1) post–biventricular pacing (BiVp) are associated with better clinical outcomes. However, some patients continue to deteriorate despite these favorable electrocardiographic changes.We tested the hypothesis that baseline LBBB and post-BiVp RV1 are associated with better cardiac function and clinical outcomes in patients with progressive...
Landmark reports have suggested that patients with QRS widening immediately after cardiac resynchronization therapy (CRT) experienced less frequently reverse left ventricular remodeling during follow-up.We sought to investigate the relationship between postoperative QRS widening relative to baseline and mortality in a prospective cohort of heart failure patients receiving CRT.A 12-lead electrocardiogram...
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