Painful Left Bundle Branch Block Syndrome Complicated by Iron-Overload Cardiomyopathy.

Painful left bundle branch block (LBBB) syndrome is a rare disease that presents as simultaneous chest pain and transient LBBB without myocardial ischemia. We diagnosed a 72-year-old Japanese man with painful LBBB syndrome complicated by iron-overload cardiomyopathy. Phlebotomy was initially performed to improve myocardial iron deposition and conductive disturbance. Ironically, his chest pain was fully improved by the completion of incessant LBBB and walk-through phenomenon. However, this case demonstrates a clinically significant therapeutic strategy for cardiomyopathy-induced painful LBBB syndrome. Due to the lack of treatment guidelines, individualized treatment is required for each case of painful LBBB.