Effect of autonomic blockade on power spectrum of heart rate variability during exercise.

@article{Warren1997EffectOA,
  title={Effect of autonomic blockade on power spectrum of heart rate variability during exercise.},
  author={Joseph H Warren and Robert S. Jaffe and Cheryl Wraa and Charles L. Stebbins},
  journal={The American journal of physiology},
  year={1997},
  volume={273 2 Pt 2},
  pages={R495-502}
}
To validate power spectral analysis of heart rate variability (HRV) as an autonomic indicator during exercise, ten males performed four identical progressive cycling tests during infusions of saline, esmolol (beta 1-blocker), glycopyrrolate (muscarinic blocker), or both drugs. Power spectra were constructed from the recorded electrocardiogram by Fourier algorithm and integrated for low-frequency power (LF) and high-frequency power (HF). Four different LF bands (0.004-0.1, 0.004-0.15, 0.05-0.1… CONTINUE READING