1924年马氏等用运动试验时心率与血压作为判定心脏功能的标准,1941年马氏等应用运动试验直接描记心电图方法,作为诊断冠心病的手段,1963年马氏等提出了标准化的双倍二级梯运动试验方法。经过成千上万的临床实践,虽然认为在冠心病高发病地区,马氏双倍二级梯运动试验价廉安全简易,亦可作为筛选方法,但是运动负荷量小,不足以激发出冠状血管循环不足的表 Markov in 1924 and other exercise test heart rate and blood pressure as a criterion for determining cardiac function, such as Markov 1941 exercise test described the direct ECG method, as a means of diagnosis of coronary heart disease, such as Markov in 1963 proposed a standardized double Two ladder test method. After thousands of clinical practice, though it is considered that in the high prevalence of coronary heart disease, the Markov double second-step exercise test is cheap and safe and can be used as a screening method. However, the exercise load is small and insufficient to stimulate the coronary vessels Undercycled table