Abstract
We investigated changes in autonomic control of the cardiovascular system during the menstrual cycle. ECGs were recorded from 8 supine subjects (4 men, 4 women) for 10 min. every day for 35 days. Each subject was studied at the same hour to avoid circadian variation. Spectral power in HR was quantified as total (TP), low (< 15 Hz, LF) and high (.15-5 Hz, HF) frequency power, and as ratios LF/HF, and HF/TP. Spectra from women were compared among follicular (FO), ovulatory (OV), and luteal (LU) phases. Data from men served as time controls. Women demonstrated surges in LF and TP during OV (26.9±6.0, 4428±1.2) compared to both FO (15.5±3.1, 26.3±6.7) and LU (15.6±2.7, 30.8±5.5) Three women also showed a surge in HF power during the ovulatory phase The LF/HF ratios were higher and HF/TP were lower during LU than FO. No consistent trends were observed in data from men. The observed changes in spectral power in women suggest that baseline autonomic function in cardiovascular control varies among menstrual phases Supported by Kentucky Space Grant Consortium/NASA.
| Original language | English |
|---|---|
| Pages (from-to) | A48 |
| Journal | FASEB Journal |
| Volume | 11 |
| Issue number | 3 |
| State | Published - 1997 |
ASJC Scopus subject areas
- Biotechnology
- Biochemistry
- Molecular Biology
- Genetics