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心收缩时间间期系同步记录心电图、心音图、颈动脉搏动图,测量其相互时间关系,以分析心脏舒缩活动中各个间期,用来判断与估计心脏功能。由于近年来心导管、心血管造影的进展,将直接测得的血液动力学变化和间接方法观察结果进行比较,认为相关性很好,从而为这种无创伤性检查方法,在临床应用上提供了可靠基础,因而已被广泛应用于左心功能
Heart systolic time interval synchronous recording of ECG, phonocardiogram, carotid artery pulsation diagram, measuring the time relationship between each other to analyze the systolic and diastolic activity in various intervals, to determine and estimate cardiac function. Due to the progress of cardiac catheterization and cardiovascular angiography in recent years, direct measurement of hemodynamic changes and indirect method observation results are compared to find good correlation, thereby providing a non-invasive examination method for clinical application A reliable basis, which has been widely used in left heart function