This study enrolled 603 patients with angiography evidenced
myocardial bridging-mural coronary artery between May 2004 to May 2009. Angiographic and clinic data were collected according to uniform protocol and standard questionnaires were used to obtain patients' demographic and clinical information. Univariate and multivariate analysis were performed to explore related risk factors.
RESULTS:
Chest pain was present in 247 cases (41.0%). Dynamic ST-T changes were found in 229 cases (38%). A total of 644
myocardial bridging-mural coronary arteries were detected including 382 (62.4%) segments located proximally to
myocardial bridging. Diastolic vessel diameters in the
myocardial bridging segment were significantly smaller than reference segments (all P < 0.01). Stepwise multiple regression analysis suggested that vascular bifurcation lesions, the degree of narrowing and the number of diseased coronary vessels of non-
myocardial bridging-mural coronary arteries, age,
LDL-C/HDL-C, male gender, diabetes, and systolic narrow rate of
myocardial bridging-mural coronary arteries were positively related with the narrowing degree of the first
coronary artery stenosis located proximally to
myocardial bridging (P < 0.05 or P < 0.01). Vascular bifurcation lesions, the degree of narrowing and the number of diseased coronary vessels of non-
myocardial bridging-mural coronary arteries, age,
LDL-C/HDL-C, male, diabetes and
dyslipidemia were positively related with the narrowing degree of the most severe
coronary artery stenosis located proximally to
myocardial bridging (P < 0.05 or P < 0.01).
CONCLUSIONS: