心电图运动负荷试验,对冠心病的诊断及病程演变、疗效随访、发病预测、甚至预后估计都有一定临床价值。Master氏双倍二级梯运动试验应用已久,简单易行,已有大量临床资料证实它的实用价值。但由于其假阴性率及假阳性率均较高,分别为12～49％及18～39％(1),近年来,为探索更理想的运动负荷试验,开展的方法很多,极量、次极量多期渐增活动平板运动试验就是目前最盛行的一 ECG exercise load test on coronary heart disease diagnosis and course of disease evolution, follow-up efficacy, prognosis, and even prognosis have some clinical value. Master double double ladder exercise test has long been used, simple and easy, there is a large number of clinical data to confirm its practical value. However, due to its high false negative rate and false positive rate, which are 12-49% and 18-39%, respectively (1), in recent years, in order to explore a more ideal exercise load test, many methods have been developed, Extremely multi-phase increased activity treadmill exercise test is one of the most prevalent