This study was designed to observe the effect of electroacupuncture ap- plied at "Renying" points on the heart rate (HR)

left ventricular end- diastolic pressure (LVEDP)

mean arterial pressure (MAP)

left ventri- cular systolic pressure (LVSP)

maximal rate of left ventricular pressure rise (dp/dtmax)

cardiac index (CI) and stroke volume index (SVI) in open-chested and anaesthetized dogs with ARF

The results showed that in the contol group (n=7)

HR

MAP

LVEDP

LVSP

dp/dtmax

C and SVI decreased gradually and significantly during the electroacupuncture was applied as ARF was produced by reducing the respiratory to the mi- nimum. electroacupuncture at left "Renying" point (frequency 1-20Hz

int- ensity 3 volts) for 15 minutes resulted significant increases in LVSP and dp/dtmax.

but no obvious changes in MAP

CI and SVI during ARF. The a bove results indicated that the cardio-heamodynamics may be de- teriorated gradually during ARF and that it may be improved after elec- troacupuncture at "Renying" points.