Objective To explore the relationship between myocardial bridging (MB) and mural coronary artery (MCA) atherosclerotic stenosis, and to identify risk factors associated with MCA stenosis.

Methods A retrospective analysis was conducted on 104 patients who underwent coronary CT angiography.Based on the presence of MB detected by coronary CT angiography, the patients were divided into MB group (n=43) and non-MB group (n=61).The degree of coronary artery stenosis was compared between the two groups.Logistic regression analysis was performed to identify the risk factors of MCA stenosis.

Results Among the coronary artery branches, MB was most frequently located in the left anterior descending branch, accounting for 55.81% (24/43) of cases.There was a statistically significant difference in the degree of coronary artery stenosis between the MB group and the non-MB group (P < 0.05).MB thickness (OR=1.931, 95%CI: 1.066-3.497, P < 0.05) and the tortuous degree of MB proximal vessel (OR=3.016, 95%CI: 1.232-7.387, P < 0.05) were risk factors of MCA stenosis.

Conclusions MB is closely associated with MCA atherosclerotic stenosis.MB thickness and the tortuosity of the proximal vessel to the MB are significant risk factors influencing MCA stenosis.