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心缩间期(STI)系通过同步记录ECG、PCG和CPT进行测量获得。根据冠脉造影测算的狭窄程度分组,并比较各组STI的平均值。STI的异常程度随着冠脉狭窄程度的加重而加大,它提示心脏功能的减退。LVEF的降低支持上述结论。作者等用STI、LVEF和ECG三种方法,检出冠心病的阳性率分别为56％,68％和48％,不同方法间无显著差异,说明STI在评价缺血性心脏病的心脏功能中有使用价值。在排除某些影响STI的因素后,PEP/LVET≥0.38可作为诊断冠心病的辅助依据。
Systolic interval (STI) was measured by synchronously recording ECG, PCG, and CPT. The severity of stenosis was estimated by coronary angiography and the mean STI was compared between groups. The severity of STI increases with the severity of coronary stenosis, which suggests a decrease in cardiac function. The decrease in LVEF supports the above conclusion. The authors used STI, LVEF and ECG three methods to detect the positive rate of coronary heart disease were 56%, 68% and 48%, no significant difference between the different methods that STI in the evaluation of cardiac function in ischemic heart disease Use value. After excluding some of the factors that affect STI, PEP / LVET ≥ 0.38 can be used as an auxiliary basis for the diagnosis of coronary heart disease.