Myocardial bridges at multiple sites over the left coronary artery in a patient with hypertrophic cardiomyopathy.

In a 47-year-old male with hypertrophic cardiomyopathy, coronary angiography revealed three myocardial bridges associated with significant systolic narrowing of the left coronary artery. Measurements during pacing and exercise demonstrated no sign of myocardial ischemia. Ten-year follow-up was uneventful. Thus, the prognosis of myocardial bridges, even when located at multiple sites across the left coronary artery, seems benign.