Bypass surgery, also called coronary artery bypass graft (CAGB), is necessary if minimally invasive methods are not possible. In this procedure, the cardiac surgeon provides a new route for the blood by implanting a segment of a healthy vessel. General anesthesia is needed to perform this open-chest surgery. First a graft, which is a piece of a healthy artery or vein, is secured from another part of the patient’s body. Then, the surgeon opens the chest and connects one end to the aorta (or another artery depending on the individual situation), and the other end below the lesion in the occluded coronary artery. The blood flow is now bypassed, ensuring the supply of oxygen.