Chest Pain Resolution with His-bundle Pacing in a Patient with Left Bundle Branch Block-related Nonischemic Left Ventricular Dysfunction.

Chest pain in patients with left bundle branch block (LBBB) and normal coronaries has been reported previously in the literature. Prior cases of intermittent LBBB and "chest pain syndrome" are known of, but the causes of and treatment options for such remain unclear. A mechanism of myocardial dyssynchrony has been proposed as a possible cause of the pain, but this has not yet widely been investigated.