HOME >> BIOLOGY >> NEWS
Estrogen linked to more efficient regulation of a woman's heartbeat

October 31, 2002 (Bethesda, MD) Men die earlier than women. This fact leads scientists and medical researchers to conclude that gender and age are two basic factors continuously affecting body functions, disease categories and even life expectancy. Previous research has determined that gender influences brain structure and functions; however, in considering the cardiac pacemaker, there is still debate as to whether heart rate dynamics differ between women and men.

Electrocardiogram (ECG) findings offer interesting arguments for both sides of the issue. There is a similarity in the sexes regarding the mean and standard deviation of the R-R interval portion of electrocardiogram (intervals between positive deflection of the QRS complex, which involves the depolarization of ventricular cardiac cells). On the other hand, women have been reported to have lower, similar, and higher high-frequency power (HF) and similar low-frequency power (LF) of heart rate variability (HRV). (HRV is a strong predictor of mortality adversely affected by such problems as anxiety, depression, and trauma.)

A team of researchers has speculated whether confusing findings in heart activity of the sexes could be attributed to the nonlinear characteristics of pacemaker activity, which may cause large variations when analyzed by traditional linear methods. Such variations might lead to severe interference if there are gender differences in the discharge from the heart's natural pacemaker, the sinus (SA) node. Accordingly, they set out to determine whether the complexity or chaos of cardiac pacemaker activity differs between women and men. Because aging may be a major determinate of heart rate dynamics, the researchers systemically studied the effect of aging on nonlinear properties and on gender-related differences. The results were then compared with standard frequency-domain methods to measure the nervous system's parasympathetic and sympathetic regulation of heart rate.
'"/>

Contact: Donna Krupa
djkrupa1@aol.com
703-527-7357
American Physiological Society
5-Nov-2002


Page: 1 2 3 4

Related biology news :

1. Estrogen promotes gender differences in brains response to stress
2. Estrogen receptor-a disruption and vasodilation in coronary arteries
3. Estrogen improves short term memory and oral reading in midlife postmenopausal women
4. Estrogen found as link between obesity and breast cancer in postmenopausal women
5. Estrogens as antioxidants reducing heart disease in younger postmenopausal women
6. Estrogen patch compared to pill minimizes cardiovascular risk factor in postmenopausal women
7. Estrogen and personality in women
8. Estrogen may protect against breast cancer
9. Estrogen combined with calcium and vitamin D may prevent tooth loss
10. Estrogen found in soy stimulates human breast-cancer cells in mice
11. Estrogen doesnt prevent second strokes: protective effects of hormone replacement therapy challenged

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:1/7/2019)... ... January 07, 2019 , ... Franz ... Graph Database technology for Knowledge Graphs solutions, announced that it was recognized by ... . DBTA’s data and information management recognition list includes newer approaches leveraging ...
(Date:1/4/2019)... ... January 03, 2019 , ... Stay on top of current hot topics through ... Access to all webinars is free, so be sure to register today to save ... http://www.xtalks.com to check out our upcoming webinars, or click below to learn more ...
(Date:12/22/2018)... ... December 21, 2018 , ... ... hosted the Boston Healthcare Drinks event featuring Helen Chen, Greater China Managing Partner ... , The discussion was moderated by patent attorney David J. Dykeman , ...
Breaking Biology News(10 mins):
(Date:1/8/2019)... ... January 08, 2019 , ... The American Society of Gene and ... by a selection committee made up of industry leaders identified by the ASGCT board ... are mentored awards created to support ASGCT members designing transformative pilot studies in gene ...
(Date:1/4/2019)... ... January 03, 2019 , ... Calidi Biotherapeutics, ... cancer, today announced the founding of a scientific and medical advisory board (SMAB). ... key leaders in the Immuno-Oncology field. The founding members of Calidi Biotherapeutics SMAB ...
(Date:12/18/2018)... ... December 18, 2018 , ... USDM Life ... the life sciences industry, unveiled a completely redesigned website at http://www.usdm.com . ... browsing experience for their valued clients and business partners. , The website ...
(Date:12/13/2018)... , ... December 12, 2018 , ... Helping conclude Healthy ... new sleek and slim hearing aid within its Vision and Hearing campaign that sets ... , Studies show that despite continued efforts to destigmatize hearing aids over the ...
Breaking Biology Technology:
Cached News: