Overview
Introduction
A myocardial bridge is an anatomic variant, not automatically coronary disease.
A myocardial bridge is an anatomic variant, not automatically coronary disease. A portion of an epicardial artery—usually the left anterior descending artery—travels through the myocardium, so contraction narrows it during systole. Most bridges never cause symptoms. The clinical problem is a hemodynamically significant bridge: tachycardia and increased contractility intensify compression while shortening diastole, the period when coronary perfusion is greatest. The high-stakes pattern for the RN is exertional or rate-related chest pain, especially when accompanied by ischemic ECG changes, syncope, or ventricular ectopy. Management therefore depends on proving that the bridge causes ischemia, protecting diastolic filling with rate-slowing therapy, avoiding aggravating medications, and escalating promptly when ACS or a dangerous arrhythmia is possible.