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目的探讨左前降支心肌桥的形态特征及其与右心室的关系。方法178例临床疑诊冠心病者行16层CT冠状动脉造影。测量左前降支壁冠状动脉的长度、深度及其与右心室的间距,记录壁冠状动脉的行程,分析其壁冠状动脉的深度及走行方向与右心室的关系。结果40例心肌桥中,位于左前降支44处。壁冠状动脉至右心室间距<1.0mm组中,壁冠状动脉深度≥1.0mm、<1.0mm的比例分别为63.16%,36.84%;壁冠状动脉至右心室间距≥1.0mm组,壁冠状动脉深度≥1.0mm、<1.0mm的比例分别为32%,68%。2组中壁冠状动脉深度有显著差异。11处(57.89%,11/19)壁冠状动脉走行向右心室偏曲,且与右心室间距<1.0mm。结论左前降支心肌桥患者,壁冠状动脉至右心室间距取决于其壁冠状动脉的深度及其走行方向。MSCT可以定量评价心肌桥的形态特征,对其手术和介入治疗有潜在应用价值。
Objective To investigate the morphological characteristics of the left anterior descending coronary artery bridge and its relationship with the right ventricle. Methods 178 patients with suspected coronary heart disease underwent 16-slice CT coronary angiography. The length and depth of the coronary artery in the left anterior descending coronary artery and the distance between it and the right ventricle were measured. The stroke of the wall coronary artery was recorded. The relationship between the depth of the coronary artery and the right ventricle was analyzed. Results 40 cases of myocardial bridge, located in the left anterior descending branch 44. The rates of wall coronary artery depth≥1.0mm and <1.0mm were 63.16% and 36.84% respectively in the range of 1.0 ~ 1.0mm between the wall coronary artery and the right ventricle; the wall coronary artery to right ventricular space≥1.0mm, the depth of wall coronary artery The proportion of 1.0 mm and 1.0 mm respectively was 32% and 68%. There were significant differences between the two groups in the depth of the middle coronary artery. Eleven (57.89%, 11/19) migrate to the right ventricle and the distance to the right ventricle is <1.0 mm. Conclusion The distance between the wall coronary artery and the right ventricle in patients with left anterior descending coronary artery is dependent on the depth of the wall coronary artery and the direction of its walking. MSCT can quantitatively evaluate the morphological characteristics of myocardial bridge, its operation and interventional treatment has potential applications.