Reporte de caso: Normalización del bloqueo de rama izquierda crónico inducido por el ejercicio: un fenómeno raro en la fase de recuperación

Video Experimental Relacionado

Updated: Jan 28, 2026

Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing

Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing

Published on: December 11, 2017

Horesh Dor-Haim^1,2, Ilia Davarashvili^1,2,3

¹Malcha Heart Institute, Jerusalem, Israel.

Frontiers in physiology

|January 26, 2026

Abstracto

Background:

Transient left bundle branch block (LBBB) is associated with various cardiac and systemic conditions, including exercise-induced ischemia. However, normalization of baseline LBBB following exertion is a rare and poorly understood phenomenon.

Case Summary:

We report the case of an 83-year-old male with longstanding coronary artery disease and baseline LBBB who underwent a routine stress echocardiogram. During the recovery phase, ECG monitoring revealed normalization of LBBB with first-degree AV block. Concurrent stress echocardiography showed improved segmental and global ventricular function.

Conclusion:

This case highlights a rare instance of post-exercise resolution of LBBB and suggests a possible link between exercise-induced autonomic modulation and transient improvement in conduction. Further research is warranted to explore the prognostic significance of this finding in patients with structural heart disease.

Palabras clave:

enfermedad de las arterias coronarias electrofisiología bloqueo de rama izquierda ecocardiograma de estrés anormalidades de conducción transitorias

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