收缩时间间期(Systolic Time Inte-rval,STI)测定是研究心肌收缩功能的一种经典方法,已积累了很多经验和资料,但因 STI 的影响因素复杂、各作者间方法上的差异,使测定结果相差较大。多数作者曾与心血管造影和血液动力学对比研究证明 STI 仍不失为反映心室功能的较敏感方法,尤其喷血前期/喷血时间(Proejetion Period/ventricular ejectiontime,PEP/VET,左室为 PEP/LVET, The Systolic Time Inte-rval (STI) is a classic method to study myocardial contractile function. It has accumulated a great deal of experience and data. However, due to the complicated factors of STI and the differences in methods among the authors, Determination of the difference between the larger. Most authors have compared cardiovascular angiography and hemodynamic studies to prove that STI is still a more sensitive method to reflect ventricular function, especially the preemergence / ejection time (PEP / VET, left ventricular PEP / LVET ,