Zhen Ci Yan Jiu. 1989 ; 14(4): 435-41.

[Effect of electro-acupuncture on the segment length of the myocardium and the left intraventricular pressure-length vector loop during experimental acute myocardial ischemic damage]

Meng JB, Liu RT, Xu HR, Fu WX, Cai JH.

In order to explore the effect of electroacupuncture on myocardial contractibility in the ischemic area, a medical Silicon tube with Saturated Copper Sulfate was used as length gauge and set at 5mm below the ligated marginalis and paralleled with blood vessel. The signals of the length and the pumping function were transmitted into the polygraph and the signals of the left intraventricular pressure (LVP) and the segment length (L) were conveyed into the oscilloscope to display the LVP-L vector loop. Electroacupuncture was applied bilaterally on Neiguan points with electrical impulses of strength 5 volts. The coronary artery was ligated for 20 min and then loosened. electro-acupuncture was performed and lasted 20 min. Imbedded the needle for 30 min, then ligated at the original position and never loosened again; 15 min later, the electroacupuncture was performed for the second time, lasting 20 min, then the needle was with drawn and observed for 15 min. The Epicardial ECG was used as the standard to judge the degree of the myocardial ischemic injury. A comparison was made between the parameters determined 15 min after ligation and all the procedures after electroacupuncture. There were 15 dogs in the electroacupuncture group and 15 in the control group. 1. The mean amplitude of segment length of the myocardium was 23 mm before ligation. 15 min after ligation, it slightly decreased in the electroacupuncture group while slightly increased in the control group. There was no obvious difference in the duration of the amplitude between the two groups.(ABSTRACT TRUNCATED AT 250 WORDS)