Methods Two groups with or without symptoms of CHD were taken VCG and ECG check respectively to compare the detective rate of abnormal items between the two groups.

• 方法选择有冠心病症状和无冠心病症状的两组人群,同时进行心向量图和心电图的检查,以比较它们诊断心肌缺血异常项目的检出率。