心动周期中各时相的测定虽然很早就有阐述,但它的临床应用直到最近几年前仍很少受到重视。这主要是因为在不能直接测量心功能之前,收缩期时相(简称 STI)不能与之进行对照,因而 STI 的生理意义得不到公认。随着近代生理学中心导管和心室掇影 Although the determination of each phase in the cardiac cycle has been described very early, its clinical application has received little attention until recent years. This is mainly because before the heart function can not be measured directly, the systolic phase (referred to as STI) can not be compared with it, so the physiological significance of STI is not recognized. With the modern physiology center catheter and ventricle shadow