冠状动脉病变累及的血管支数是判断冠心病患者预后的独立危险因素。如能早期预测,在患者未发生心血管危险事件以前,切实有效的干预,对预后是十分有益的。aVR导联位于额面右上方位,其负极(-aVR导联)位于Ⅰ和Ⅱ导联之间,在急性心肌梗死时其改变对判断心肌缺血的相关动脉(IRA)有着 Coronary artery lesions involved in the number of blood vessels to determine the prognosis of coronary heart disease independent risk factors. As early predictions, effective interventions can be very beneficial to the prognosis until the patient has had a cardiovascular risk event. The aVR lead is located in the upper right hand side of the frontal plane, and its negative (-aVR lead) is located between leads I and II. The change in the aVR leads to the determination of the IRA related to myocardial ischemia