Time-series analysis of heart rate variability during submaximal exercise. Evidence for reduced cardiac vagal tone in animals susceptible to ventricular fibrillation.

@article{Billman1989TimeseriesAO,
  title={Time-series analysis of heart rate variability during submaximal exercise. Evidence for reduced cardiac vagal tone in animals susceptible to ventricular fibrillation.},
  author={George E. Billman and Rob Hoskins},
  journal={Circulation},
  year={1989},
  volume={80 1},
  pages={146-57}
}
Periodic fluctuations in the R-R interval have been used as noninvasive measures of cardiac autonomic tone. For example, a reduced heart rate variability has been shown to correlate with an increased mortality in patients recovering from myocardial infarction. The effects that physiologic perturbations such as exercise have on this heart rate variability have not been investigated. Therefore, heart rate variability was measured throughout a submaximal exercise test in 36 mongrel dogs with… CONTINUE READING