现已证明,心血管系统无创伤性检查方法和心导管检查测得血液动力学变化有较好的相关性。而这种方法具有安全、无痛苦、可重复、方便易行等优点,因而,越来越为人们所重视。同步记录心电图、心音图、颈动脉和心尖搏动图并测量相互时间关系,用以判断心脏疾病和估计心脏功能,已为临床上成人常 It has been demonstrated that there is a good correlation between the noninvasive cardiovascular system and hemodynamic changes detected by cardiac catheterization. And this method is safe, painless, repeatable, easy to operate and so on, therefore, more and more attention. Simultaneous recordings of electrocardiogram, phonocardiogram, carotid and apical beating charts and measurement of inter-temporal relationships to determine heart disease and estimate cardiac function have been clinically routine