Coronary Artery Bypass Graft (CABG) is most common type of heart surgery that is performed to treat people suffering from severe angina and Coronary Artery heart disease. In coronary heart disease, a plaque is formed inside the coronary artery that carries oxygenated blood to myocardium.   As the plaque becomes harder over the time, it narrows down the artery and subsequently causes reduced blood flow to heart leading to chest pain called angina. In CABG, a healthy artery or vein from...