Myocardial bridging is one type of anatomic variations of coronary arteries and may cause ischemic manifestation or even sudden deaths in young people
this anomaly is still a challenge for cardiac interventionists and surgeons. This study aimed at identifying the mean frequency and sites of myocardial bridging and at analyzing its clinical significance Research methodology: This retrospective and anterospective descriptive research was carried out using 64-MSCT films of 1108 patients taken from June 2008 to July 2009. These patients had clear images of coronary arteries
in case of stenosis, the lesions less than 50 percent of the diameter of the arteries were chosen for this research. Results: 14.2 percent of patients had anatomic variations in coronary arteries, 10.65 percent of which were myocardial bridging
all of these myocardial bridging instances were present somewhere on the route of anterior inter-ventricular arteries (P-LAD 0,59 percent, M-LAD 75,42 percent, D-LAD 19,49 percent). The average length of the bridges was 16,93 + or - 7,95 mm, while the depth was 2,06 + or - 1,06. 37.5 percent to 67.8 percent of patients were detected abnormal coronary arteries without, clinical symptoms. Conclusion: 64-MSCT can be used to detect early and exactly the form and anatomic variations of coronary arteries. This is very helpful in screening coronary artery diseases.