Dual left anterior descending coronary artery: surgical revascularization in 4 patients.

Dual left anterior descending artery (or dual anterior interventricular artery) is a rare coronary anomaly. It is important to know the anatomic variants of this anomaly in patients with coronary artery disease who are undergoing either surgical myocardial revascularization or coronary angioplasty. We report the cases of 4 patients who had anatomic variants of dual left anterior descending coronary artery. These patients had developed coronary artery disease in the long or the short left anterior descending artery, or in both. The long left anterior descending artery was diseased in 1 patient, and the short left anterior descending artery was diseased in another In the 3rd and 4th patients, both the long and the short arteries were atherosclerotic and had developed severe stenosis. All 4 patients underwent successful myocardial revascularization. There was no electrocardiographic evidence of perioperative myocardial infarction. All patients were asymptomatic during the follow-up period, which ranged from 3 months to 1.5 years. Angiographers and surgeons alike must be aware of the variants of dual left anterior descending coronary artery, so that the diseased vessels can be correctly identified even if 1 of the dual arteries is 100% occluded.