EC control should satisfy the order of the body physical situation. The emphasis is that the inflation and deflation time can be regulated accurately, which makes the heart from systaltic to diastolic, when the counterpulsation wave would emerge. 体外反搏控制要符合人体生理要求,关键是精确地调节充、排气信号的定时,使心脏从收缩转入舒张时反搏波能立即出现。