intraventricular pressure

Dihydralazine increased HR and myocardial tension-time index per minute at 15 min after medication in conscious rabbits, but the maximum rate of intraventricular pressure rise was not changed. These results suggested that the major cause of increased myocardial oxygen consumption is induced by elevated HR.

兔静脉注射双肼苯哒嗪，心率加快，每分钟心室肌张力&时间指数（TTI·HR）增加，心室内压变化最大速率无改变，提示心率加快是心肌耗氧增加的主要原因。

Experiments were performed on 15 anaesthetized dogs, mean arterial pressure, left intraventricular pressure, dp/ dt max,-dp/ dt max and the area of cardiac force loop ( CFL) were reduced markedly by intravenous infusion of sodium nitroprusside ( NP).

实验在麻醉狗中进行。静脉内匀速注射硝普钠时，平均动脉压和左心室收缩压明显降低，左心室dp/dt（max）、-dp/dt（max）和心力环面积均明显减小。