Increased sympathetic and decreased parasympathetic cardiac innervation in patients with Alzheimer's disease.

@article{AharonPeretz1992IncreasedSA,
  title={Increased sympathetic and decreased parasympathetic cardiac innervation in patients with Alzheimer's disease.},
  author={Judith Aharon-Peretz and T. Harel and Moshe Revach and Shlomo A. Ben-Haim},
  journal={Archives of neurology},
  year={1992},
  volume={49 9},
  pages={919-22}
}
To assess whether Alzheimer's disease affects the sympathetic and parasympathetic influences on the heart rate, we used power spectrum analysis of heart rate variability derived from simple body-surface electrocardiography. We calculated the energy ratio of low- to high-frequency bands. This ratio was significantly higher in patients with Alzheimer's disease than in normal controls (upright posture, 0.41 +/- 0.21 vs 0.23 +/- 0.08). The parasympathetically mediated baroreceptor activity… CONTINUE READING