The following result is obtained by our internet Research Algorithm: Coronary Artery Bypass Surgery is as the name suggest when you get a blockage in your coronary vessel to treat that a healthy vein from another part of the body is connected or grafted to the blocked coronary artery. The grafted artery or the vein bypasses the blocked portion of the coronary artery carrying the oxygen-rich to the heart muscle. One or more coronary artery can be bypassed in a single operation. Before the surgery, an inter venous line will be started and you may be given a medication which will help you to relax.