Objective To observe the effect of electroacupuncture(EA) of "Neiguan"(PC 6) and "Taichong"(LR 3) on mechnical activities of the heart in acute myocardial ischemia(AMI) rabbits.Methods Fifty chinchilla rabbits were randomized into normal control

model

EA-PC 6

EA-LR 3 and non-acupoint groups(n=8/group).AMI model was duplicated by intravenous injection(femoral vein) of posterior pituitrin(3 U/kg).The maximal ascending velocity(+dp/dt max)

maximal descending velocity(-dp/dt max) and left ventricular systolic pressure(LVSP) of the heart were recorded by using Biopac Bio-signal system.EA(1 mA

2 Hz) was applied to PC 6

LR 3 and non-acupoint for 10 min.Results Compared with normal control group

+dp/dt max

-dp/dt max and LVSP of the heart in model group reduced significantly(P<0.01);while in comparison with model group

left ventricular +dp/dt max and-dp/dt max at 10 min after EA in EA-PC 6 and EA-LR 3 groups increased markedly(P<0.01)

and LVSP of EA-PC 6 group increased remarkably(P<0.05).No significant differences were found between EA-non-acupoint group and model group in the above-mentioned 3 indexes(P>0.05).Conclusion Both EA of PC 6 and LR 3 points can improve AMI induced reduction of the left ventricular myocardial mechanical activities in the rabbit

and the therapeutic effect of EA-PC 6 is superior to that of EA-LR 3.