How Stuff Works -
All the basic facts about the need for a heart bypass operation and how blood vessels are used.
http://www.howstuffworks.com/question120.htm

Learn About Bypass -
 Information on coronary artery disease, or atherosclerosis, including information on risks, symptoms such as angina, and bypass surgery procedures.
http://www.learnaboutbypass.com

Mamas Health -
Information about coronary artery disease. Find out who is at risk, diagnosing and statistics.
http://www.mamashealth.com/coronary.asp

Mayo Clinic: Coronary Artery Disease -
A description of the most common type of heart disease, its symptoms, causes, diagnosis and treatment.
http://www.mayoclinic.com/home?id=5.1.1.3.38

Medtronic.com -
Cardiovascular disease resources for sufferers of circulatory conditions and patients seeking information about coronary artery disease and treatment options.
http://www.medtronic.com/cad/

National Heart, Lung and Blood Institute -
In-depth look at coronary heart disease, who is at risk, controllable and uncontrollable risks, causes, symptoms, tests, treatment, lifestyle changes and surgery.
http://www.nhlbi.nih.gov/health/dci/Diseases/Cad/CAD_WhatIs.html

Nutrition and Exercise: Healthy Balance for a Healthy Heart -
A look at coronary artery disease and cholesterol and the role diet plays in this disease.
http://familydoctor.org/288.xml

Probability of Coronary Artery Disease -
Diagram of the heart and the arteries, discussion about calcification and calculation of the likelihood of CAD.
http://www.chestx-ray.com/Coronary/CorCalc.html