Surgical treatment of the coronary artery disease, which is a complication due to stenosis and occlusion in the coronary vessels feeding the heart, is done by opening the thoracic cage. There are a few small holes in the chest cage that are in operation. However, this surgical procedure can not be applied to every patient. After opening the chest in the classical surgeon, the heart and lungs are connected to a device called a heart-lung pump. Thus, the heart and lungs are disabled. At this time, usually remotely, from within the chest (ataxia of the breast) or cords are prepared spare arteries. These vessels are anastomosed to the patient's own artery to make a blocked artery by-pass (bridging) on the heart. The blood then feeds through the newly inserted arteries instead of the occluded vein. The heart and lung are separated from the so-called pump. This will complete the operation of the patient. When you are asleep, you get intense attention.