双源CT对孤立性心肌桥-壁冠状动脉的研究

Study of Dual-source CT on Isolated Myocardial Bridge Mural Coronary Artery

目的:通过双源CT冠状动脉成像,研究孤立性心肌桥-壁冠状动脉的特性。方法:收集2013年1月-2017年1月在本院进行冠状动脉CT检查,仅检出心肌桥-壁冠状动脉且无冠状动脉粥样硬化症、冠心病等其他心脏相关疾病的患者数据,根据肌桥的位置、患者性别分组比较,研究分析孤立性心肌桥-壁冠状动脉的特性。结果:324例检出孤立性心肌桥-壁冠状动脉的患者中,男146例,女178例,平均年龄(57.94±10.50)岁。共检出心肌桥-壁冠状动脉350处,其中左前降支346处,右冠状动脉2处,对角支及中间支各1处。患者心肌桥-壁冠状动脉的发病年龄比较,差异无统计学意义(P>0.05)。检出肌桥位置以左前降支中段好发,不同肌桥位置的患者性别比较,差异有统计学意义(P<0.05),其中近段心肌桥-壁冠状动脉以男性患者多见(P<0.05),而中、远段肌桥患者性别比较,差异均无统计学意义(P>0.05)。此外不同位置的肌桥长度比较,差异有统计学意义(P<0.05),男性患者中、远段肌桥要长于女性(P<0.05)。心肌桥-壁冠状动脉类型以表浅型多见,与位置无相关性(P>0.05)。结论:双源CT冠状动脉成像对孤立性心肌桥-壁冠状动脉的位置、长度、壁冠状动脉类型的诊断有重要意义。

Objective：The characteristics of isolated myocardial bridge mural coronary artery was studied by dual-source CT coronary angiography.Method：Data were collected from patients of coronary CT scan in our hospital from January 2013 to January 2017 that only myocardial bridge mural coronary artery was detected without any coronary atherosclerosis,coronary heart disease and other cardiac-related diseases.Data of each group that according to the location of myocardial bridge and gender of patients were compared,and analyze characteristicsof isolated myocardial bridge mural coronary artery.Result：324 cases of isolated myocardial bridge mural coronary artery detected,146 cases were male and 178 were female,the average age was（ 57.94±10.50） years old.There were 350 sites of myocardial bridge mural coronary arteries were detected,the left anterior descending arteries were 346 sites,the right coronary arteries were 2 sites,the diagonal branch and the middle branch was each of 1 site.The age of onset of the myocardial bridge mural coronary artery in patients was compared,the difference was not statistically significant（P0.05）.Myocardial bridge occurred more at the middle of the left anterior descending,the different locations in the myocardial bridge of gender was compared,the difference was statistically significant（P0.05）,the proximal segment of myocardial bridge mural coronary artery were more common in male patients（P0.05）,but the middle and distal of myocardial bridge of gender were compared,the differences were not statistically significant（P0.05）.Additionally,the length of the myocardial bridge at different locations was compared,the difference was statistically significant（P0.05）,the length of the distal myocardial bridge in men was longer than that of women（P0.05）.Type of mural coronary artery was more common in superficial type and there had no correlation between types and myocardial bridge locations（P0.05）.Conclusion：Dual-source CT coronary angiography is important for the diagnosis of the location,length and type of isolated myocardial bridge mural coronary artery.