Coronary artery disease and CABG

Which of the following is true regarding the conduct of off pump-CABG?

Which of the following is responsible for the long-term patency and resistance to vasopressors with LIMA grafts?

A 65 year old male with history of emergent CABGx2 (SVG-LAD, SVG-PDA), presented with new onset angina, and was found to have a positive stress test. This prompted a left heart cath that demonstrated 70% stenosis of the vein graft supplying the LAD. Echo shows EF of 40% with no valvular disease. Cardiac MRI shows subendocardial enhancement of the LAD territory and viable myocardium. Plan is to undergo CABGx1 with LIMA to LAD. Intraoperative, the LIMA is accidentally transected and harvested a free graft. Which of the following is the best management in performing the bypass?

A 45 year old male presents with inferior STEMI and is taken emergently to the cath lab where a culprit lesion in the RCA is stented. Completion angiography demonstrates 90% left main stenosis. After the intervention, the ST elevations do not improve, and he remains hypotensive. Which of the following is the best management?

A 56 year old male with ESRD on hemodialysis and diabetes is found to have 3 vessel coronary artery disease (90% LAD moderate caliber, 70% circumflex with moderate caliber OM1 and OM2, 70% proximal RCA with moderate caliber distal RCA and PDA) on workup for renal transplantation. Which of the following is the best conduit configuration?