Possible Involvement of Coronary Microvascular Dysfunction in Painful Left Bundle Branch Block

Abstract

Cases of painful left bundle branch block syndrome have been reported; however, the pathophysiology of chest pain remains unclear. Here, we report a patient with left bundle branch block and chest pain. We evaluated coronary microvascular dysfunction using guide wire–based thermodilution. (Level of Difficulty: Intermediate.)

Keywords

• chest pain
• coronary flow reserve
• coronary microvascular dysfunction
• index of microvascular resistance
• left bundle branch block