that is , group 1 : new myocardial revascularization in the patients whose coronary arteries are too small or diffuse due to atherosclerosis , group 2 : laser vascular anastomosis especially for small-caliber vessels , such as coronary artery bypass grafting , group 3 : laser angioplasty for obstructive arterial disease .
C0205042
coronary arteries
C0010055
coronary artery bypass grafting