Exercise-Induced Left Bundle Branch Block Resulting in Severe Mitral Regurgitation.
JACC Case Rep 2021;
3:1287-1290. [PMID:
34471879 PMCID:
PMC8387835 DOI:
10.1016/j.jaccas.2021.06.029]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 05/26/2021] [Accepted: 06/17/2021] [Indexed: 11/21/2022]
Abstract
Exercise hemodynamic catheterization is helpful to evaluate exertional symptoms when noninvasive investigations fail to provide an explanation in non-ischemic cardiomyopathy. In this case, a rate-related left bundle branch block resulted in severe dynamic mitral regurgitation and acute increase in pulmonary capillary wedge pressure. Cardiac resynchronization therapy resolved her symptoms. (Level of Difficulty: Intermediate.).
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