- American Heart Associationwww.americanheart.org
- Preventing Heart Disease: What You Can Dowww.cdc.gov
- Heart Disease | MedlinePluswww.medlineplus.gov
- American Health Care Associationwww.ahcancal.org
- Heart Disease Risk Factors | womenshealth.govwww.womenshealth.gov
- How the Heart Works | National Heart, Lung, and Blood Institute (NHLBI)www.nhlbi.nih.gov
