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在急诊室评价急性前胸痛是一个最常见的问题,胸痛原因的早期诊断有重要的治疗和预后意义。急性心肌缺血引起心电图形态的动态改变,追踪这一变化对于早期发现急性缺血是一个灵敏的方法。作者用高分辨力心电图描记法确定QRS波平均形态,再计算心动之间QRS波某一亚区的形态变化,从而测定心动之间心电图形态的变异性。
Evaluation of acute chest pain in the emergency department is the most common problem and early diagnosis of chest pain has important therapeutic and prognostic implications. Acute myocardial ischemia leads to a dynamic change in the morphology of the electrocardiogram. Tracking this change is a sensitive method for early detection of acute ischemia. The author uses high resolution electrocardiography to determine the average morphology of QRS wave and then calculate the morphological changes of a subregion of QRS wave between heartbeats to determine the variability of electrocardiogram morphology between heartbeats.