Abstract
Congenital coronary artery anomalies are uncommon. Dual left anterior descending coronary artery (LAD) is defined as the presence of two LADs within the anterior interventricular sulcus (AIVS), and is classified into four types. Type IV is a rarely reported subtype and differs from the others, with a long LAD originating from the right coronary artery (RCA). Dual LAD is a benign coronary artery anomaly, but should be recognised especially before interventional procedures. With the increasing use of multidedector computed tomography (MDCT), it is essential for radiologists to be aware of this entity and the cross-sectional findings.
Highlights
Dual left anterior descending coronary artery (LAD) is defined as the presence of two LADs within the anterior interventricular sulcus (AIVS): a short LAD that courses and terminates high in the AIVS, and a long LAD that originates from either the LAD proper or from the right coronary artery (RCA), enters the distal AIVS and courses to the apex.[1]
Coronary artery anomalies associated with their origin, course and distribution are frequently asymptomatic and have been diagnosed during conventional coronary angiography.[2]
The precise course of the coronary arteries may be easier to appreciate with CT angiography (CTA) than with conventional angiography because of the omniplanar capability of CT
Summary
Dual left anterior descending coronary artery (LAD) is defined as the presence of two LADs within the anterior interventricular sulcus (AIVS), and is classified into four types. Type IV is a rarely reported subtype and differs from the others, with a long LAD originating from the right coronary artery (RCA). Dual left anterior descending coronary artery (LAD) is defined as the presence of two LADs within the anterior interventricular sulcus (AIVS): a short LAD that courses and terminates high in the AIVS, and a long LAD that originates from either the LAD proper or from the right coronary artery (RCA), enters the distal AIVS and courses to the apex.[1] Type IV can be differentiated from the other types by the long LAD originating from the RCA
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