Objective To investigate the clinical characteristics, operative indications, operative methods and operative effect of myocardial bridge(MB). Methods From Oct.1996 to Feb.2007, 34 cases with MB underwent MB operation in Fu Wai Hospital. There were 10 cases with isolated myocardial bridge, 4 complicated with coronary artery heart disease, 15 complicated with heart valve diseases, 3 complicated with hypertrophic obstructive cardiomyopathy, 1 complicated with Marfan’s syndrome and 1 complicated with atrial septal defect. All the 34 cases were diagnosed definitely by coronary angiography. According to cardiac function classification（NYHA）, there were 30 cases in gradeⅡ and 4 cases in gradeⅢ. Thirtytwo cases involved left anterior descending(LAD), 1 involved posterior descending branch(PDB) and 1 involved circumflex(CX), with a length of 1-6 cm respectively. Fifteen cases underwent myotomy on myocardial bridge and 19 cases underwent coronary artery bypass grafting(CAGB). Results Among cases who underwent myotomy on myocardial bridge, there was 1 intraoperative right ventricle perforation which was cured after repair. Among cases who underwent myotomy on myocardial bridge with mitral valve replacement concomitantly, there was 1 death caused by left ventricular rupture. There was no other operative complication. Thirty cases were followed up for 15-124 months. Two cases with isolated MB had angina pectoris after myotomy on myocardial bridge and were controlled by drugs. Among 30 cases with MB, 25 in NYHA gradeⅠ, 2 in gradeⅡ and 3 in gradeⅢ. Conclusion The surgical treatments of myocardial bridge include myotomy on myocardial bridge and CABG, and can be properly chosen according to the length, position of myocardial bridge, and having or not having mural coronary artery proximal atherosclerosis. Both the two treatments can obtain satisfactory clinical outcome.
目的探讨冠状动脉心肌桥（myocardial bridge，MB）的诊断、手术适应证、手术方式及手术效果。 方法回顾性分析2010年6月至2014年12月我院13例冠状动脉心肌桥患者行外科手术治疗的临床资料，其中男9例、女4例，年龄42～68岁。单纯MB 8例，合并冠心病2例，合并瓣膜病2例，合并先天性房间隔缺损1例，单纯8例MB均在非体外循环下行心肌桥松解术，2例合并冠心病患者在非体外循环下行心肌桥松解+冠状动脉旁路移植术，其余3例均在体外循环心脏停跳下行心肌桥松解+心内畸形矫治术。 结果13例外科手术均获成功，无并发症发生，患者心绞痛症状缓解，心电图提示心肌缺血明显改善，超声心动图检查提示心功能较术前明显提高，术后随访3～48个月，1例单纯MB患者行松解术后仍有心绞痛，应用药物控制，其余术后无不适症状，冠状动脉CT显示无心肌桥。 结论对冠状动脉心肌桥行外科手术治疗，能取得较满意的近、中期效果。