Left Bundle Branch Block in a 29-Year-Old Non-Competitive Runner

Abstract

Left bundle branch block (LBBB) is an electrocardiogram (EKG) abnormality that represents disruption of the normal electrical conduction system. While commonly found in patients with cardiomyopathies, it may manifest even in the absence of any other cardiac disease. Transient LBBB is likely a common intermediate step in the progression from a normal EKG to chronic LBBB. Given that a chronic LBBB portends poor outcomes, transient LBBB may be an early indication to initiate cardiopulmonary evaluation. We present a case of a 29-year-old Caucasian male with multiple admissions for chest pain which progressed from a normal EKG to transient LBBB, to chronic LBBB over a 2-year period.




J Med Cases. 2017;8(3):86-89
doi: https://doi.org/10.14740/jmc2760w