Outcomes With Left Bundle Branch Block and Mildly to Moderately Reduced Left Ventricular Function

This study aimed to define the prognosis for patients with left bundle branch block (LBBB) and a mildly to moderately reduced left ventricular ejection fraction (LVEF) (36% to 50%) as well as to clarify whether LBBB remained a negative prognostic marker in this group. LBBB is associated with worse outcomes in patients with heart failure in the setting of severely reduced LVEF. The level of morbidity and mortality associated with LBBB in the...