Coronary artery diseases are basically caused when the blood and oxygen flow to the heart muscles get limited because of the narrowing arteries. However, the process of hardening of the arteries can be slowed down by regular angioplasty, proper medication and also by bringing in changes in lifestyle. Nevertheless, a bypass surgery becomes inevitable when these treatments do not work out.

A bypass surgery deals with creating a new path for the blood and oxygen to flow to the heart without any interruption. The doctor/surgeon uses a healthy vein from a different part of the body, generally from the wrist, leg or from the chest. This vein is then attached to the coronary artery of the patient near the blocked vein – this procedure allows the blood to bypass the hardened/narrowed path.