Myocardial Bridging With Left Ventricular Hypertrophy: A Case of Exercise-Induced Cardiac Arrest With Coronary Spasm.

ABSTRACT:

Background

A 17-year-old male athlete experienced out-of-hospital cardiac arrest due to ventricular fibrillation during exercise. Myocardial bridging (MB) and vasospasm were identified as potential contributors to the event.

Case summary

Initial imaging revealed MB of the mid-left anterior descending artery embedded within hypertrophic myocardium. Physiological assessment demonstrated significant ischemia, and acetylcholine provocation testing induced epicardial spasm, confirming MB-induced ischemia with vasospasm. Fluorodeoxyglucose positron emission tomography showed increased tracer uptake, initially suggesting malignancy, but histopathology attributed this to ischemia-related metabolic changes. The patient underwent surgical unroofing with intraoperative confirmation of

SUBMITTER: Toya T 

PROVIDER: S-EPMC12441336 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature