Atrial inotropic responses to brief vagal stimuli: frequency-force interactions.

@article{Martin1980AtrialIR,
  title={Atrial inotropic responses to brief vagal stimuli: frequency-force interactions.},
  author={Patrick Martin},
  journal={The American journal of physiology},
  year={1980},
  volume={239 3},
  pages={H333-41}
}
The effect of brief vagal stimulus burst on atrial contractile force was assessed in paced- and unpaced-heart preparations by recording the changes in pressure (AP) generated in a balloon in the right atrial appendage or by a miniature strain gauge on the atrium. One and 3 stimuli per vagal burst depressed AP up to 62 and 90%, respectively. The response varied with the time in the cardiac cycle at which the stimulus was given. Identical stimuli produced a greater inotropic depression at longer… CONTINUE READING