Case Report: Exercise-induced normalization of chronic left bundle branch block: a rare recovery-phase phenomenon
Horesh Dor-Haim1,2, Ilia Davarashvili1,2,3
1Malcha Heart Institute, Jerusalem, Israel.
Frontiers in Physiology
|January 26, 2026
Summary
Transient left bundle branch block (LBBB) can resolve after exercise, a rare finding. This case suggests exercise may transiently improve cardiac conduction in some patients with heart disease.
Area of Science:
- Cardiology
- Electrophysiology
Background:
- Transient left bundle branch block (LBBB) is linked to cardiac and systemic conditions, including exercise ischemia.
- Resolution of baseline LBBB after exertion is uncommon and not well understood.
Keywords:
coronary artery diseaseelectrophysiologyleft bundle branch blockstress echocardiogramtransient conduction abnormalitiesMore Related Videos
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