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 August 27, 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 August 27, 2014).

Share This




More Health & Medicine News

Wednesday, August 27, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Predicting Heart Transplant Rejection With a Blood Test

Predicting Heart Transplant Rejection With a Blood Test

Ivanhoe (Aug. 27, 2014) Now a new approach to rejection of donor organs could change the way doctors predict transplant rejection…without expensive, invasive procedures. Video provided by Ivanhoe
Powered by NewsLook.com
Better Braces That Vibrate

Better Braces That Vibrate

Ivanhoe (Aug. 27, 2014) The length of time you have to keep your braces on could be cut in half thanks to a new device that speeds up the process. Video provided by Ivanhoe
Powered by NewsLook.com
Smartphone App Tracks Your Heart Rate

Smartphone App Tracks Your Heart Rate

Ivanhoe (Aug. 27, 2014) A new app that can track your heart rate 24/7 is available for download in your app store and its convenience could save your life. Video provided by Ivanhoe
Powered by NewsLook.com
Stroke in Young Adults

Stroke in Young Adults

Ivanhoe (Aug. 27, 2014) A stroke can happen at any time and affect anyone regardless of age. This mother chose to give her son independence and continue to live a normal life after he had a stroke at 18 years old. Video provided by Ivanhoe
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:
from the past week

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