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心电图运动试验的原理是通过运动增加心肌的氧耗量,以揭示冠状动脉血供的限制,其所以产生心肌缺血的主要表现为心电图上S-T段的移位。目前常用的麦氏双倍二级梯运动试验与近年来开展的踏板和踏车分级运动试验已成为临床上估计冠状动脉血供的一种不可缺少的手段。然而,许多其他原因,包括心瓣和心肌病、严重肺气肿,预激综合症、二尖瓣脱垂、植物神经平衡失调,严重贫血、洋地黄作用、缺钾等均可引起心电图运动试验的S-T段改变。冠状动脉造影与心电图运动试验的对比研究显示,心电图运动试验有一定的假阳性和假阴性率,特别在
Electrocardiogram exercise test principle is to increase myocardial oxygen consumption through exercise to reveal the limitations of coronary blood supply, which is why the main manifestation of myocardial ischemia S-T segment of the ECG shift. At present, the commonly used Maxwell’s double second-order ladder exercise test and treadmill and treadmill grading exercise test carried out in recent years have become an indispensable means for clinically estimating coronary blood supply. However, many other causes, including cardia and cardiomyopathy, severe emphysema, Wolff-Parkinson’s syndrome, mitral valve prolapse, autonomic imbalance, severe anemia, digitalis action, potassium deficiency, etc. can all cause electrocardiographic exercise tests ST segment changes. A comparative study of coronary angiography and electrocardiogram exercise testing has shown that electrocardiographic exercise tests have some false positives and false negatives, particularly in