冠状动脉狭窄和心缩间期的对照研究

Comparative Study of Coronary Artery Constriction and Systolic Time Intervals

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 time intervals (STI) were measured from the simultaneous recording of the electrocardiogram (ECG), phonocardiogram (PCG) and carotid artery pulse tracing (CAR,CPT) and mean values of STI were compared among groups of patients divided according to the degree of coronary arteries constriction. The greater abnormalities of STI with increase of coronary artery involvement suggest a progressive worsening of cardiac performance with increasing severity of coronary artery constriction. The decrease of LVEF supportes this conclusion. The positive rate of coronary artery disease detected by STI,LVEF and ECG methods is 56%,48% and 68% respectively and there are no differences among the three methods. This study suggests that STI is useful in the evaluation of cardiac performance in ische-mic heart disease. When some factors influencing STI are ruled out, PEP/LVET> 0.38 is an auxiliary means of diagnosing coronary artery disease.