Type IV dual left anterior descending artery associated with anomalous origin of the left circumflex coronary artery from the right coronary artery: a case report.

Dual left anterior descending coronary artery (LAD) originating from the left main stem and the right coronary artery (RCA) (Type IV dual LAD) is a very rare coronary artery anomaly. Association of this anomaly with the anomalous origin of the circumflex artery from the RCA is a very rare occurrence. In this report, we describe a patient presenting with acute lateral wall myocardial infarction who subsequently was found to have this coronary anomaly.