| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH |
|
|
|
|||||||
|
|||||||||
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
1 Shou-Feng Health Station, Hualien 974, Taiwan
2 Institute of Neuroscience, Tzu Chi University, Hualien 970, Taiwan; Department of Neurology, Tzu Chi Buddhist General Hospital, Hualien 970, Taiwan
3 Department of Physiology, Tzu Chi University, Hualien 970, Taiwan
* To whom correspondence should be addressed. E-mail: cchyang{at}mail.tcu.edu.tw.
Our previous studies demonstrated that premenopausal women have dominant vagal and subordinate sympathetic activity compared with age-matched men. This study was designed to investigate the role of estrogen in gender-related autonomic differences. We evaluated the heart rate variability of four healthy groups: aged-matched postmenopausal women without hormone replacement therapy (PM), postmenopausal women on conjugated estrogen replacement therapy (PME), men and non age-matched premenopausal women (PreM). Frequency-domain of short-term and stationary R-R intervals was performed to evaluate low-frequency power (LF; 0.04-0.15 Hz), high-frequency power (HF; 0.15-0.40 Hz), ratio of LF to HF (LF/HF), and LF in normalized units (LF%). No gender-related autonomic differences existed between the PM group and the men group, but they did exist between the PME group and the men group. Compared with the PreM group, the PM group had a lower HF and higher LF% and LF/HF. Compared with the PM group, the PME group had a higher HF but lower LF% and LF/HF. These results suggest that conjugated estrogen replacement therapy may facilitate vagal and attenuate sympathetic regulation of the heart rate in postmenopausal women. In addition, estrogen may play an important role in gender-related autonomic differences.
This article has been cited by other articles:
|
|
 |
|
  J. Aittokallio, J. Hiissa, T. Saaresranta, P. Polo-Kantola, T. Aittokallio, and O. Polo Nocturnal transcutaneous carbon dioxide tension in postmenopausal estrogen users and non-users Menopause Int, September 1, 2009; 15(3): 107 - 112. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 R. P. Sloan, P. A. Shapiro, R. E. DeMeersman, E. Bagiella, E. N. Brondolo, P. S. McKinley, I. Slavov, Y. Fang, and M. M. Myers The Effect of Aerobic Training and Cardiac Autonomic Regulation in Young Adults Am J Public Health, May 1, 2009; 99(5): 921 - 928. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 V. M. Miller and S. P. Duckles Vascular Actions of Estrogens: Functional Implications Pharmacol. Rev., June 1, 2008; 60(2): 210 - 241. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 Y.J. Akashi, G. Barbaro, T. Sakurai, K. Nakazawa, and F. Miyake Cardiac autonomic imbalance in patients with reversible ventricular dysfunction takotsubo cardiomyopathy QJM, June 1, 2007; 100(6): 335 - 343. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 S. Lavi, O. Nevo, I. Thaler, R. Rosenfeld, L. Dayan, N. Hirshoren, L. Gepstein, and G. Jacob Effect of aging on the cardiovascular regulatory systems in healthy women Am J Physiol Regulatory Integrative Comp Physiol, February 1, 2007; 292(2): R788 - R793. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 M.-W. Tsai, W.-C. Chie, T. B. Kuo, M.-F. Chen, J.-P. Liu, T. H.-H. Chen, and Y.-T. Wu Effects of Exercise Training on Heart Rate Variability After Coronary Angioplasty Physical Therapy, May 1, 2006; 86(5): 626 - 635. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH |
| Visit Other APS Journals Online |
