E-ISSN: 1305-3612
Anatomic variations and anomalies of the coronary arteries: 64-slice CT angiographic appearance
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Cardiovascular Imaging - Original Article
VOLUME: 15 ISSUE: 4
P: 275-283
December 2009

Anatomic variations and anomalies of the coronary arteries: 64-slice CT angiographic appearance

Diagn Interv Radiol 2009;15(4):275-283
DOI: 10.4261/1305-3825.DIR.2550-09.1
Pınar Koşar
Elif Ergun
Cansu Öztürk
Uğur Koşar
1. Department of Radiology, Ankara Training and Research Hospital, Ankara, Turkey
No information available.
No information available
Received Date: 05.01.2009
Accepted Date: 24.03.2009
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ABSTRACT

PURPOSE

To retrospectively review the 64-slice computed tomography (CT) appearance of coronary artery anatomic variants and anomalies and determine their incidence in 700 patients.

MATERIALS AND METHODS

CT data of 700 patients who underwent 64-slice CT angiography (CTA) because of known or suspected coronary artery disease were retrospectively reviewed by two radiologists experienced in cardiovascular radiology. In each study, anatomic variants and anomalies were investigated.

RESULTS

The coronary artery system was right dominant in 76%, left dominant in 9.1% and co-dominant in 14.8% of the cases. Ramus intermedius was present in 31%. Conus artery with a separate ostium in the right sinus Valsalva was observed in 22%, and in 0.2% two conus arteries originating with separate ostia were visualized. The sinus node artery (SNA) originated from the right coronary artery (RCA) in 79%, from the circumflex artery (Cx) in 20%, and from the left main coronary artery (LMCA) in 0.4%. In 0.4% of the cases SNA originating from the right sinus Valsalva with a separate ostium was seen. LMCA was absent in 0.4%. Cx was absent in 0.1%, and diagonals were absent in 0.1%. High takeoff of LMCA and RCA were observed in 0.7% and 0.1%, respectively. Myocardial bridging was observed in 37%. Anomalous origin of the coronary artery from the opposite sinus was observed in 1% of the cases.

CONCLUSION

Complex anatomy of the coronary artery system can accurately be depicted by 64-slice CTA. This modality is useful in detecting coronary artery variants and anomalies and is a valid alternative to conventional coronary angiography in their diagnosis.