The effects of emotions on short-term power spectrum analysis of heart rate variability .

@article{McCraty1995TheEO,
  title={The effects of emotions on short-term power spectrum analysis of heart rate variability .},
  author={Rollin McCraty and Mike Atkinson and William A. Tiller and Glen Rein and Arthur D. Watkins},
  journal={The American journal of cardiology},
  year={1995},
  volume={76 14},
  pages={1089-93}
}
In summary, this work extends previous findings by demonstrating that anger produces a sympathetically dominated power spectrum, whereas appreciation produces a power spectral shift toward MF and HF activity. Results suggest that positive emotions lead to alterations in HRV, which may be beneficial in the treatment of hypertension and in reducing the likelihood of sudden death in patients with congestive heart failure and coronary artery disease.