Your doctor may recommend bypass surgery if you have a blockage in one or more of your coronary arteries. Coronary arteries are the small blood vessels that supply your heart with oxygen and nutrients that are carried in your blood.
Varicose veins are large, often winding dilated veins that often stick out from under the skin and occur mostly in the legs. They occur because the valves in the veins that prevent blood from flowing backward (away from the heart rather than towards it) are not working properly. In some people this is a hereditary problem, in others the problem…