Coronary artery anomalies are usually asymptomatic and associated with other cardiac malformations. Dual left anterior descending coronary artery (LAD) is an uncommon congenital anomaly with four subtypes. This anomaly has been described in the angiographic literature and dual LAD types depending on the origin of major septal and diagonal branches and course within the anterior interventricular sulcus. Type IV expresses the anomaly of a rudimentary LAD artery ending in the mid-portion of the anterior interventricular sulcus, and the presence of other LAD originating from the right coronary artery and continuing to the anterior interventricular sulcus. We report the rare case of a patient with the type IV dual left anterior descending coronary artery.
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