【摘要】 目的观测心肌桥与壁冠状动脉形态学变化,探讨心肌桥与壁冠状动脉病变的关系。方法收集40例尸体心脏标本,观测心肌桥的出现率;测量心肌桥的长、宽、厚度;取心肌桥前、桥下、桥后的冠状动脉,分别石蜡包埋,切片,HE染色,观察各部位血管壁结构的变化。结果在40例心脏标本中,发现心肌桥23处,出现率为56%。其中左冠状动脉及分支上出现心肌桥为18例(占45%),右冠状动脉及分支上发现心肌桥为5例(占12.5%)。心肌桥平均长、宽、厚度分别(1.49±0.135)cm、(0.39±0.036)cm、(0.18±0.050)cm。心肌桥冠状动脉内膜测量,桥前段较桥下、桥后段有明显不规则增厚,差异有统计学意义(P<0.05)。结论心肌桥的出现以单一前室间支为主。心肌桥宽度、长度对桥前壁冠状动脉内膜厚度影响较小,心肌桥的厚度与桥前冠状动脉内膜增厚呈正相关。心肌桥的厚度对冠状动脉病变可能有重要关系。更多还原

【Abstract】 Objective To observe the morphology of myocardial bridge(MB) and mural coronary(MC) artery,analyse relativity of the myocardial bridge and mural coronary artery.Methods The posi-tion and frequency of the myocardial bridge were studied with 40 hearts specimens.The location of my-ocardial bridge and its length,width,thickness were measured.The samples were embedded in paraffin and HE staining was performed for being observed under microscope.Result Among all of the 40 cases,23 cases(56%) myocardial bridge presented.Among them,in 18 cases(45%) it was showed in left coronary artery and its branch,in 5 cases(12.5%) it was showed in right coronary artery and its branch.The length,width,thickness of the myocardial bridge were 1.49±0.135cm,0.39±0.036cm,0.18± 0.050cm respectively.The intima of the coronary artery of anterior part of myocardial bridge was signifi-cantly thicker than that of the inferior and posterior segment(P<0.05).Conclusion Myocardial bridge maily shows in anterior interventricular branch and its width and the length show little interrelation with thickness of the intima of the PreMC.Its thickness correlates with atherosclerosis.更多还原