American Heart Association

7272 Greenville Avenue

Dallas, TX 75231

1-800-AHA-USA-1

http://www.heart.org

On this site, you will find general information about heart disease, including educational information, news, research, health programs, and dietary information.

Heart Rhythm Society

1325 G Street, NW

Suite 400

Washington, DC 20005

(202) 464-3400

http://www.hrsonline.org

The Heart Rhythm Society offers articles on heart rhythm disorders, symptoms and diagnosis, treatments, risk factors, and prevention.

National Heart, Lung, and Blood Institute (NHLBI)

NHLBI Health Information Center

Building 31, Room 5A52

31 Center Drive MSC 2486

Bethesda, MD 20892

(301) 592-8573

http://www.nhlbi.nih.gov/

The NHLBI is a part of the National Institutes of Health. The site provides information about cholesterol, heart disease risk factors, and various heart conditions. The institute conducts and supports research related to the causes, prevention, diagnosis, and treatment of heart, blood vessel, lung, and blood diseases as well as sleep disorders.