Featured Research

from universities, journals, and other organizations

Blood Is Less Sticky With Estrogen Replacement Therapy

Date:
December 11, 1998
Source:
American Heart Association
Summary:
By helping keep their blood less sticky, or viscous, hormone replacement therapy (HRT) may help women lower their risk of heart disease, according to a study in today's Arteriosclerosis, Thrombosis and Vascular Biology: Journal of the American Heart Association.

DALLAS, Dec. 11 -- By helping keep their blood less sticky, or viscous, hormone replacement therapy (HRT) may help women lower their risk of heart disease, according to a study in today's Arteriosclerosis, Thrombosis and Vascular Biology: Journal of the American Heart Association.

Robert Rosenson, M.D., director of the Preventive Cardiology Center, Rush-Presbyterian-St. Luke's Medical Center, and collaborators at the University of Michigan at Ann Arbor, measured the viscosity of plasma -- the fluid component of blood -- in 23 women. Viscosity is the friction of a fluid that makes it resist flowing. Water has a low viscosity while molasses is highly viscous.

"Plasma viscosity is an important predictor of initial and recurrent heart attack and stroke," says Rosenson. "Studies have suggested viscosity to be as important a predictor of heart disease risk as smoking, diabetes, cholesterol or blood pressure, but this is the first study to evaluate the influence of HRT on plasma viscosity."

The study found that HRT lowered a woman's blood viscosity. This effect may be a new mechanism for the cardiovascular protection received by women taking HRT, says Rosenson.

Researchers divided the 23 women in the study into three groups. Seven women received estrogen plus progesterone therapy, eight women took estrogen alone, and the remaining eight received an inactive pill called a placebo.

"At the end of 12 weeks, viscosity in both groups receiving estrogen therapy decreased by about four percent. Based on other studies we would equate this change in viscosity to a decrease in heart disease risk by about 20 percent," says Rosenson.

Rosenson also notes that blood levels of low-density lipoprotein (LDL) or the 'bad' cholesterol of the women in both estrogen groups fell by 29 percent, and fibrinogen levels decreased by 14 percent.

Previous studies have indicated that HRT lowers blood levels of fibrinogen, a clotting factor, and LDL cholesterol says Rosenson. These factors may contribute to plasma viscosity because higher levels of fibrinogen and LDL make blood stickier, he adds.


Story Source:

The above story is based on materials provided by American Heart Association. Note: Materials may be edited for content and length.


Cite This Page:

American Heart Association. "Blood Is Less Sticky With Estrogen Replacement Therapy." ScienceDaily. ScienceDaily, 11 December 1998. <www.sciencedaily.com/releases/1998/12/981211083757.htm>.
American Heart Association. (1998, December 11). Blood Is Less Sticky With Estrogen Replacement Therapy. ScienceDaily. Retrieved September 30, 2014 from www.sciencedaily.com/releases/1998/12/981211083757.htm
American Heart Association. "Blood Is Less Sticky With Estrogen Replacement Therapy." ScienceDaily. www.sciencedaily.com/releases/1998/12/981211083757.htm (accessed September 30, 2014).

Share This



More Health & Medicine News

Tuesday, September 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

How 'Yes Means Yes' Defines Sexual Assault

How 'Yes Means Yes' Defines Sexual Assault

Newsy (Sep. 29, 2014) Aimed at reducing sexual assaults on college campuses, California has adopted a new law changing the standard of consent for sexual activity. Video provided by Newsy
Powered by NewsLook.com
Scientists May Have Found An Early Sign Of Pancreatic Cancer

Scientists May Have Found An Early Sign Of Pancreatic Cancer

Newsy (Sep. 29, 2014) Researchers looked at 1,500 blood samples and determined people who developed pancreatic cancer had more branched chain amino acids. Video provided by Newsy
Powered by NewsLook.com
Colo. Doctors See Cluster of Enterovirus Cases

Colo. Doctors See Cluster of Enterovirus Cases

AP (Sep. 29, 2014) Doctors at the Children's Hospital of Colorado say they have treated over 4,000 children with serious respiratory illnesses since August. Nine of the patients have shown distinct neurological symptoms, including limb weakness. (Sept. 29) Video provided by AP
Powered by NewsLook.com
Dr.'s Unsure of Cause of Fast-Spreading Virus

Dr.'s Unsure of Cause of Fast-Spreading Virus

AP (Sep. 29, 2014) Doctors at the Children's Hospital of Colorado say they have treated over 4,000 children with serious respiratory illnesses since August. Nine of the patients have shown distinct neurological symptoms, including limb weakness. (Sept. 29) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins