The prevalance of left circunflex coronary artery origin and course variants was defined as % 0.3-0.8 by various angiographic and cadaver studies. Variants of the LCX, arising from left coronary artery, were defined in three patterns. RCA and LCX arise from right coronary sinus as different roots (type 1), RCA and LCX arise from same root (type 2) or LCX arise from proximal RCA (type 3) (4). In our case there was type 2 variation.

Atrial septal pouch is a recess at atrium, which is formed by incompled fusion of cranial segments of septum primum and septum secundum. Atrial septal pouch is a predisposition to thrombosis.

Atrial diverticulas are the cyst like extentions which is extending out of the cardiac chambers and containing only muscle layer. Prevalance is reported %19-41 and diagnosed incidentally (6).

When a coronary artery anomaly is diagnosed, the origin, course of the artery and relation to other cardiac structures must be described in detail. Coronary CT angiography is a very useful diagnostic modality recently, in defining coronary artery anomalies and co-insidental cardiac pathologies.