Coronary Artery Bypass LAD Bypass Graft3 D reconstruction of a CTA of the coronary arteries shows a patent bypass graft from the ascending aorta to the proximal LADPhilips Medical Systems44647b09 PDA Bypass Graft3 D reconstruction of a CTA of the coronary arteries shows a patent bypass graft from the ascending aorta to the posterior descending arteryPhilips Medical Systems44647b09