缺血性J波发生的导联与心肌缺血的导联基本相同,因此二者具有良好的相关性。冠心病患者J波的出现是心肌严重缺血导致复极异常的标志,它与恶性室性心律失常的发生密切相关。在急性心脏缺血事件中J波单独出现,或与ST段抬高,或与T波电交替同时出现时均是心脏猝死的高危预警指标。因此在急性冠状动脉综合征患者中,缺血性J波的存在及其动态演变过程在对急性心肌缺血范围、缺血程度及其预后的判定具有重要的临床意义。 Ischemic J wave lead and myocardial ischemic lead is basically the same, so the two have a good correlation. The appearance of J wave in patients with coronary heart disease is a sign of repolarization caused by severe myocardial ischemia, which is closely related to the occurrence of malignant ventricular arrhythmia. J waves in acute cardiac ischemic events alone, or with ST-segment elevation, or alternating with T-wave are high-risk indicators of sudden cardiac death. Therefore, in patients with acute coronary syndromes, the existence of ischemic J wave and its dynamic evolution have important clinical significance in judging the scope of acute myocardial ischemia, the degree of ischemia and the prognosis.