Coronary artery bypass grafting (CABG) is a well established treatment modality for patients with coronary artery disease. For 30 years now CABG operations have been performed with the help of the heart lung machine (Cardiopulmonary bypass). However, the heart lung machine is believed to be responsible for many of the side effects and complications seen in patients following CABG surgery. The organs most commonly affected are the brain, blood constituents, lungs and kidneys.