1.  http://ctsurgerypatients.org/adult-heart-disease

2.  http://www.heart.org/HEARTORG/Caregiver/Resources/WhatisCardiovascularDisease/What- is-Cardiovascular-Disease_UCM_301852_Article.jsp#.V5e0ovkrK70

3.  https://medlineplus.gov/bloodheartandcirculation.html

4.  WebMD – http://www.webmd.com

5.  Society of Thoracic Surgeons – http://www.sts.org

6.  American Heart Association – http://www.americanheart.org

7.  Dr. Koop – http://www.drkoop.com

8.  Netscape’s Health Channel – http://health.netscape.com

9.  Heart Surgery Information Page – http://www.heart-surgeon.com

10. Methodist Healthcare System – http://www.sahealth.com