ST段改变是目前临床上判断心肌缺血的主要指标,但因其敏感性不高,致使部分急性冠脉综合征被漏诊.而心电图上还有一些指标在判断心肌缺血上与ST段改变具有等同价值,且出现时间早于ST段改变,但因没有得到充分认识常被临床忽视,如缺血性J波、QRS波终末变形、U波倒置、胸导联T波失衡、孤立性TaVL波倒置、ST段平段延长等.本文汇集了上述几种等价指标的个案分析,旨在引起临床重视.
ST-segment changes serve as primary clinical indicators for assessing myocardial ischemia at present.However,owing to their relatively low sensitivity,parts of patients with acute coronary syndrome may be missed diagnosed.Several other ECG markers could be equated with ST-segment changes in the evaluation of myocardial ischemia with earlier occurrence time.These ECG markers include ischemic J waves,terminal QRS distortion,U-wave inversion,chest lead T-wave imbalance,isolated TaVL wave inversion,and ST-segment prolongation.However,they are often ignored clinically because of being lack of comprehensive understandings.This paper presents case analyses involving these equivalent indicators,which is aimed to attract clinical attention.