Purpose: To evaluate the characteristic multidetector-row computed tomography (MDCT) findings of anomalous double right coronary arteries (RCAs), an extremely rare variant.
Methods: During a 3-year period, 2569 patients with chest pain underwent MDCT coronary angiography. Five patients (0.2%) with anomalous double RCAs were found (mean age, 66 years; range, 43-81 years; 3 women). The location and number of orifice, anatomical distribution of the RCA and its branches, and presence of atherosclerosis were analyzed.
Results: All the 5 cases of double RCAs originated from the right sinus of Valsalva and could be classified into 3 types according to the characteristics. One patient (type 1) had a double RCA arising from 2 separated orifices in the right sinus of Valsalva; another patient (type 2) had 2 separate RCAs originating from a common orifice in the sinus of Valsalva; the other 3 patients with double RCAs (type 3) had a common main RCA in the sinus of Valsalva with a proximal bifurcation, like the usual left coronary arterial system.
Conclusions: Our data showed that although a double RCA is a rare anomaly, it is easily detected using MDCT and can be classified into 3 types.
From the *Department of Radiology, Kangnam Sacred Heart Hospital, Hallym University College of Medicine; †Department of Radiology, 21st Century Hospital; ‡Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine; and §Department of Internal Medicine, Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul, South Korea.
Received for publication February 7, 2010; accepted March 31, 2010.
Reprints: Sa Rah Yoon, MD, Department of Radiology, Kangnam Sacred Heart Hospital, Hallym University College of Medicine, 94-195, Yeongdeungpo-dong, Yeongdeungpo-gu, Seoul 150-030, South Korea (e-mail: firstname.lastname@example.org).
Conflict of interest (financial or nonfinancial): None.