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Objectives: In a long-term randomised coronary artery bypass grafting (CABG) study, the patency rate using a new ‘no touch’ (NT) vein-graft preparation technique was superior to the conventional (C) technique. This cineangiographic and intravascular ultrasound (IVUS) substudy examined possible mechanisms. Methods: A total of 45 patients (118 grafts) in the NT group and 46 patients (112 grafts) in...