Coronary artery bypass surgery is a surgical technique used to restore blood flow that supplies the heart. There are two types: with ECC and off-pump CABG. When surgery is performed with the second technique, a portion of the bypass or graft (piece of artery or healthy vein extracting surgeon elsewhere in the body) is connected, around the area of blockage in the artery, restoring the flow blood. This operation prevents bypass the patient has side effects and improve its recovery. In the case of using cardiopulmonary bypass, surgery is required to stop the heart while a machine is responsible for assuming his role and that of the lungs.