Case Reports: Unusual bridging on dual-source CT coronary angiography: right atrial myocardial bridging

Coronary artery normally courses epicardially, not infrequently, however, segments of these arteries encapsulated by myocardium. This variation and encapsulated artery is known as myocardial bridging and tunneled artery, respectively (1). In autopsy and multidetector computed tomography (MDCT) series myocardial bridge segments were reported in ventricular muscle (2-6). Right atrial myocardial bridging with a tunneled artery embedded in the myocardium of the right atrium, is an extremely rare coronary anomaly, which has been reported only in a case previously (7). Herein, we report dual-source computed tomography (DSCT) coronary angiography findings of two unusual cases with right atrial coronary artery bridges, which were referred to our hospital with suspicion of coronary artery disease.