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目的探讨左前分支传导阻滞(LAH)的T环形态及异常的临床价值。方法分析心肌梗死患者(心肌梗死组)、正常人(正常对照组)各50例及心电图、心电向量图检查均符合LAH诊断的LAH患者70例(LAH组)[LAH组按是否并发心脏其他病变又分为正常亚组(32例)和异常亚组(38例)]的T向量环改变及临床意义。结果正常对照组T环形态多呈狭长型,占96%(48/50);心肌梗死组T环多呈圆小型、狭小型和圆长型,占94%(47/50),2组T环形态比较差异有统计学意义(P<0.01)。LAH组中正常亚组T环形态呈狭长型84.4%(27/32),异常亚组T环形态呈圆小型、狭小型和圆长型占81.6%(31/38),2亚组T环形态比较差异亦有统计学意义(P<0.01)。而正常亚组与正常对照组T环形态比较差异无统计学意义(P>0.05)。结论心电向量图检查可以揭示LAH并发心脏病患者的T环改变,对已有T环形态异常者应当予以重视。
Objective To investigate the clinical value of T-ring morphology and abnormalities in left anterior branch block (LAH). Methods Fifty patients with myocardial infarction (AMI group), 50 normal subjects (normal control group) and 70 patients with LAH diagnosed by LAH (electrocardiogram and electrocardiogram) were included in the study. Lesions were divided into normal subgroup (32 cases) and abnormal subgroup (38 cases)] T vector ring changes and clinical significance. Results The morphology of T-ring in normal control group was mostly long and narrow, accounting for 96% (48/50). The T-ring in myocardial infarction group was round, small and round, accounting for 94% (47/50) There was significant difference in ring morphology (P <0.01). The morphology of T-ring in normal subgroup was 84.4% (27/32) in the LAH group. The T-ring morphology of the abnormal subgroup was round, 81.6% (31/38) in the narrow subtype, The differences in morphology were also statistically significant (P <0.01). There was no significant difference in T-ring morphology between normal subgroup and normal control group (P> 0.05). Conclusions ECG examination can reveal T-ring changes in patients with LAH complicated with heart disease, and should pay attention to those with abnormal T-ring morphology.