Anatomical Classifications of the Coronary Arteries in Complete Transposition of the Great Arteries and Double Outlet Right Ventricle with Subpulmonary Ventricular Septal Defect
10 September 2015
18 December 2015
02 March 2016 (online)
Objective To discuss the anatomical morphologies of the coronary arteries and frequencies of unusual coronary arteries in complete transposition of the great arteries and double outlet right ventricle (DORV) associated with a subpulmonic ventricular septal defect (VSD).
Methods Between March 1999 and August 2012, 1,078 patients with complete transposition of the great arteries or DORV with subpulmonary VSD underwent arterial switch operations (ASOs) and were visually evaluated to classify their coronary artery morphology during open heart surgery.
Results The coronary arteries could be classified into five patterns with several subtypes. Unusual coronary arteries were observed in 248 of the 1,078 cases, providing a frequency of 23.01%. The frequencies of the patients with transposition of the great arteries with intact ventricular septum (TGA/IVS), TGA/VSD, and DORV with subpulmonary VSD were 17.65, 23.28, and 31.84%, respectively. The most common morphologies were the right coronary artery (RCA) originating from sinus 1 and circumflex (CX) originating from sinus 2 (1R, AD; 2CX; 26.50%); the CX originating from sinus 2 (1AD; 2R, CX; 21.36%); the RCA, left anterior descending artery, and CX originating from single sinus 2 (2R, AD, CX; 13.24%). The in-hospital mortalities of the patients with or without unusual coronary arteries after ASO were 14.1 and 6.02%, respectively.
Conclusion Patients with complete transposition of the great arteries or DORV with subpulmonary VSD have a high frequency of unusual coronary arteries, which might greatly impact on the mortality for ASO. Improving the preoperative diagnostic criteria for coronary artery morphology may significantly increase the success rate for ASOs.
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