用改进的国产 SJ-42型四道生理记录仪对14只家兔左室压一阶与二阶微分指标分析研究后发现,d~2p/dt_(max)~2对心肌变力作用的敏感性比 dp/dt_(max)高出约1/3,两项指标对心脏前后负荷和心率均具有一定的依赖性,但两者间无明显差异,提示用心室压力瞬时加速度指标评价心脏收缩性能比用压力瞬时速度指标更为灵敏可靠。 Analysis of the first-order and second-order differential indices of left ventricular pressure in 14 rabbits by using a modified domestic SJ-42 four-channel physiological recorder showed that the sensitivity of d ~ 2p / dt max (-2) to myocardial inotropic effect Sex ratio dp / dt_ (max) higher than about 1/3, the two indicators of heart load and heart rate before and after a certain dependence, but no significant difference between the two, suggesting that the instantaneous acceleration of ventricular pressure index to evaluate cardiac systolic performance Instantaneous pressure than pressure indicators more sensitive and reliable.