Background - : An abnormal ECG during maximal exercise testing has been shown to be a powerful predictor of future coronary heart disease (CHD) mortality in asymptomatic men.
背景：极量运动试验时心电图异常是无症状冠心病患者未来冠心病死亡率的强预测因子。
Background - : An abnormal ECG during maximal exercise testing has been shown to be a powerful predictor of future coronary heart disease (CHD) mortality in asymptomatic men.
背景：极量运动试验时心电图异常是无症状冠心病患者未来冠心病死亡率的强预测因子。
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