1. David S. Frankel et al. JACEP 2015;1:398-407
QRS Morphology Categories Presenting and underlying QRS morphologies are illustrated. The number of patients experiencing and not experiencing the primary endpoint (death, transplantation, or LVAD) is provided within each QRS morphology category. Patients who experienced an endpoint were more likely to present with biventricular pacing (p < 0.001) and to have underlying left bundle branch block (p = 0.01). BiV = biventricular; IVCD = intraventricular conduction delay; LBBB = left bundle branch block; LVAD = left ventricular assist device; RBBB = right bundle branch block; RV = right ventricular.
David S. Frankel et al. JACEP 2015;1:
American College of Cardiology Foundation