American Academy of Family Physicians
Family doctor.org: Heart Attack
This article discusses signs and symptoms and prevention measures regarding heart attacks. A short chart is also provided on the risk factors involved in a heart attack.
CK-12 Foundation
Ck 12: Biology: Circulatory System Diseases
[Free Registration/Login may be required to access all resource tools.] An overview of cardiovascular diseases and their risk factors.
American Heart Association
American Heart Association: Heart Attack
This resource presents brief information defining a heart attack. The article also contains many links to related topics and publications in English and Spanish.