Normalization of left ventricular function following cardiac resynchronization therapy: left bundle branch block as a potential etiology of dilated cardiomyopathy.


Patients with chronic heart failure (HF) not infrequently present conduction disturbances, which are most commonly exhibited as a left bundle branch block (LBBB). LBBB is associated with intraventricular conduction delay, paradoxical septal motion, and hemodynamic deterioration, indicating an impairment of left ventricular (LV) function. However, there is… (More)