孤立性心肌桥的心电图特征

Characteristics of the electrocardiogram in isolated myocardial bridge

目的探索心肌桥患者的心电图特征。方法选择2351例冠状动脉造影所检出的37例孤立性心肌桥患者为研究对象,按Nobel分级标准分为3级,对其心电图进行分析。另选择150例冠状动脉造影正常且无其他心脏疾病者作为对照组,比较两组患者早期复极综合征(ERS)发病率。结果部分心肌桥患者的心电图可表现为ST段下移≥0.1mV伴或不伴有T波倒置(心肌缺血样改变),其中Ⅰ级占12.5%,Ⅱ级占33.3%,Ⅲ级占72.7%,三组之间比较差异有统计学意义,P<0.05。心肌桥患者中ERS发病率为21.6%,对照组发病率为2.0%,P<0.05。结论心肌桥患者的心电图可以表现为正常、心肌缺血样改变及ERS,心肌缺血样改变的发生率与心肌桥的严重程度呈正相关,心肌桥患者中ERS的发病率较正常人群高。

Objective To explore the characteristics of the electrocardiogram in myocardial bridge patient. Methods Chose 37 isolated myocardial bridge patients from the 2351 patients who had been performed coronary arteriongraphy. Distribute them into 3 groups according to Nobel criterion. Quantitative analyze the patients’ electrocardiogram and clinical manifestation. Chose another 150 people whose coronary, arteriongraphy were normal and without heart disease to be the control group. Compared early repolarization syndrome（EILS） incidence between those two groups. Result A part of myocardial bridge patient＇s electrocardiogram manifest ST segment depression 〉10.1 mV with or without T wave inversion （myocardial ischemia） ： Ⅰ ：12.5 %, Ⅱ ：33.3 %,Ⅲ ：72.7%, P 〈 0.05. The EILS incidence in myocardial bridge group was 21.6%, the control group was 2.0% ,P 〈 0.05. Conclusion The electrocardiogram of myocardial bridge patient can manifest normal, myocardial ischemia and ERS. The incidence of myocardial ischemia in myocardial bridge patients＇ ECG positively correlates with the degree of myocardial bridge. The incidence of ERS is higher than normal people.