Autonomic control of right atrial contractile strength in the dog
- 1 June 1979
- journal article
- research article
- Published by American Physiological Society in American Journal of Physiology-Heart and Circulatory Physiology
- Vol. 236 (6) , H860-H865
- https://doi.org/10.1152/ajpheart.1979.236.6.h860
Abstract
The combined effects of parasympathetic and sympathetic stimulation on right atrial contractile strength were assessed in open-chest, pentobarbital-anesthesized dogs. A factorial experimental design was employed to quantify the percent changes in atrial contractile strength in spontaneously beating and paced hearts as a function of the frequencies of vagal and stellate ganglion stimulation. In 7 of 10 dogs, there was a substantial interaction between the two autonomic divisions; the sympathetically mediated inotropic effect became less pronounced as the background level of vagal stimulation increased. The relationship between stimulation frequencies and atrial contractile strength was not significnatly altered by pacing the hearts.This publication has 9 references indexed in Scilit:
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