PMC

LCA, with the “short” LAD artery coursing through the proximal part of the AIVS. (a) LAO cranial view. (b) LAO caudal “spider” view. LCA, left coronary artery; LAD, left anterior descending artery; AIVS, anterior interventricular sulcus; LAO, left anterior oblique.

LCA, with the “short” LAD artery coursing through the proximal part of the AIVS. (a) RAO caudal view. (b) PA caudal view. LCA, left coronary artery; LAD, left anterior descending artery; AIVS, anterior interventricular sulcus; RAO, right anterior oblique; PA, posterior-anterior.

The “long” LAD artery, from the right sinus of Valsalva, close to the RCA ostium (a), until the distal part of the AIVS, after the emergence of a large septal branch (b). LAD, left anterior descending artery; RCA, right coronary artery; AIVS, anterior interventricular sulcus.

CT angiography confirming the anomalous (interarterial) course of the long LAD artery (white arrow) from the right sinus of Valsalva (close to the RCA ostium), coursing along the distal part of the AIVS (the pulmonary trunk was removed). CT, computed tomography; LAD, left anterior descending artery; RCA, right coronary artery; AIVS, anterior interventricular sulcus.