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心缩间期(Systolic time intervals STI)是分析同时描记的心电图、心音图与颈动脉波图之间的时间关系,从而计算出心室收缩期各时相的数值。经过对照观察这些数据与由心导管及造影等心内方法所测得的相应心缩时相结果相关性很好。因而,根据心缩间期可以分析研究左心室收缩射血功能和血液动力学变化,对心脏功能进行评价。心缩
Systolic time intervals (STI) is the analysis of simultaneous electrocardiogram, phonocardiogram and carotid artery wave chart of the time relationship between the ventricular contraction phase to calculate the value of each phase. After a controlled observation of these data and the heart catheterization and angiography and other endocardial methods measured by the appropriate correlation between the results of the correlation is very good. Thus, cardiac function can be evaluated by analyzing left ventricular systolic ejection function and hemodynamic changes according to the systolic interval. Shrink