Women more susceptible to orthostatic hypotension

New study provides physiological basis that women are more susceptible to orthostatic hypotension than men

November 27, 2001 -- Bethesda, Md. The American Journal of Physiology: Heart and Circulatory Physiology, one of the 14 peer-reviewed journals published by the American Physiological Society (APS), spotlights recent research findings designed to improve and understand human well and health. The November edition includes a study focusing on the association of gender, erect posture, and subnormal arterial blood pressure.

Introduction and Purpose

Individuals who experience symptoms such as lightheadedness and palpitations while they stand are considered to have orthostatic intolerance. According to the Vanderbilt University Autonomic Dysfunction Center, Many patients also note other symptoms with upright posture: visual changes, discomfort in the head or neck, throbbing of the head, poor concentration, tiredness, weakness, and occasionally fainting. It is estimated that up to 500,000 Americans have the disorder, which appears in individuals less than 35 years of age, and affects women more frequently than men.

Whereas most reports indicate that susceptibility for orthostatic intolerance is more common in women than in men, the mechanisms of this gender difference are unclear. The upright posture causes reductions in venous return leading to diminished stroke volume (SV) and cardiac output (Qi). To maintain blood pressure, the reduction in SV must be compensated for by reflex mechanisms that increase total peripheral resistance (TPR). Otherwise, blood pressure falls, leading to cerebral hypoperfusion and syncope. Reports over several decades support the hypothesis that adequate sympathetic constrictor responses during the assumption of upright posture are critical for the maintenance of arterial pressure and cerebral perfusion. Whether orthostatic sympathetic vascular control is different between genders has not

Contact: Donna Krupa
American Physiological Society

Page: 1 2 3 4 5

Related biology news :

1. Women who have donated eggs sought for national study
2. Donaghue Womens Health Investigator Program awards grants to three at Yale
3. Top Houston Women in Technology honoree at UH
4. Marie Curie Nobel Centennial Celebration of Women in Science
5. Victoria Hale of Institute for OneWorld Health Named Fellow by International Womens Forum
6. Women who drink may be at greater risk of cardiovascular complications than men
7. Jefferson and Brigham and Womens researchers find blue light important for setting biological clock
8. Women are more likely to suffer recurrent miscarriages if their first child is a boy
9. Womens health issues, child and adolescent disorders featured at APAs annual meeting
10. Women who marry alcoholics
11. Pregnancy hormone induces healthy blood vessels, Magee-Womens Research Institute scientists report

Post Your Comments:

(Date:3/3/2020)... ... , ... Board-certified oral and maxillofacial surgeon, Dr. Michael Noffze offers experienced ... experience, Dr. Noffze can successfully extract problem and impacted wisdom teeth in teens and ... to the oral and overall health of most patients as these extra teeth can ...
(Date:3/2/2020)... ... ... Philadelphia IP law firm Panitch Schwarze Belisario & Nadel LLP is pleased ... Partner, and Stephany G. Small, Ph.D., has joined the firm as a patent agent. ... in the firm’s biotechnology and life science practice group. He has significant experience with ...
(Date:3/2/2020)... ... March 02, 2020 , ... Rigaku Corporation ... Analytical Chemistry and Applied Spectroscopy ( Pittcon 2020 ), being held March 1 ... annual conference and exposition on laboratory science, attracting attendees from industry, academia and ...
Breaking Biology News(10 mins):
(Date:3/12/2020)... ... 2020 , ... With the beginning of 2020, Park Systems, ... in Europe by inaugurating a new scientific facility for academic and industrial research ... Center Europe took place Tuesday, February 18, 2020, gathering customers, collaborators and business ...
(Date:3/4/2020)... ... March 04, 2020 , ... This month, Cognosante will make its annual ... will showcase both expanded and emerging offerings that align with the HIMSS annual theme, ... to be comprehensive, timely, and engaging. From Interoperability and HIE to ...
(Date:2/26/2020)... Del. (PRWEB) , ... February 25, 2020 , ... ... DuPont Nutrition & Biosciences (DuPont) recently published the results of its safety assessment ... over 130 HMOs currently identified in human milk. These complex carbohydrates are indigestible ...
(Date:2/21/2020)... ... February 21, 2020 , ... ... their manufacturing operations in order to adapt to new approaches like ‘Industry 4.0’ ... the increasing demand for personalized medicine and therapies. But with an industry with ...
Breaking Biology Technology:
Cached News: