Multidetector-row CT coronary angiographic finding of myocardial bridging.

Myocardial bridging is caused by muscles overlying the intramyocardial course of an epicardial coronary artery. It is a congenital anomaly characterized by systolic compression of the tunnelled segment, commonly affecting the mid-portion of the left anterior descending coronary artery. The authors report two cases of myocardial bridging using electrocardiogram-gated multidetector-row CT coronary angiography as a reliable and non-invasive imaging technique.