Heart
Diseases
MedlinePlus Health Information
http://www.nlm.nih.gov/medlineplus/heartdiseases.html
Heart
and Circulation Topics
MedlinePlus Health Information
http://www.nlm.nih.gov/medlineplus/heartandcirculation.html
Cardiovascular
Diseases
Healthfinder—Your Guide to Reliable Health Information
http://www.healthfinder.gov/scripts/SearchContext.asp?topic=139&super=113&Branch=5