Anatomic variants and anomalies of coronary arteries detected by computed tomography angiography in southern Thailand.

OBJECTIVE: To evaluate the prevalence of coronary artery anatomic variants and anomalies detected by computed tomography angiography (CTA) MATERIALS AND METHODS: A retrospective study was conducted on all patients undergoing coronary CTA using a 64-detector row CT in the Radiology Department, Songklanagarind Hospital, from January 2010 to January 2013. Data were recorded and analyzed.

RESULTS: The imaging results of 279 patients were reviewed. One hundred and twenty-two females (43.7%) and 157 males (56.3%) [age range, 26-82 years] were reviewed for coronary artery variants and anomalies with post-processing images. The right coronary dominance was the most common dominant type (91.4%). The prevalence of ramus intermedius was 68.8%; those of the absence of the left main coronary artery and left circumflex artery were 0.4%, respectively; and of the high takeoff of the coronary artery was 3.6%. Anomalies of origin and course were detected as the right coronary artery originating from the left coronary sinus in 1.1% of the patients. Myocardial bridging and coronary fistulas were demonstrated in 55.6% and 0.7% of our subjects, respectively.

CONCLUSION: A coronary CTA can effectively represent the complex anatomy of the coronaries as well as their anatomic variations and anomalies. The prevalence of most coronary variations were in concordance with the data of previous reports.