<prompt> The most common cause of morbidity and moality in patients undergoing major vascular surgery is:Renal complicationsThrombo embolic phenomenonCoagulopathiesCardiac complications  <response>: D i.e. Cardiac Complication Myocardial peiformanceQ is the single most impoant determinant outcome following a major vascular operation. Non fatal and fatal MIsQ are the most impoant specific outcomes that determine per operative cardiac morbidity in a patient undergoing vascular surgery. The dominant risk factor for perioperative morbidity moatity in patients scheduled for abdominal aoic aneurysmectomy is found to be - cardiac 47 pulmonary 31Q age older than 85 years 17 Renal failure 2 Retroperitoneal fibrosis 2 Cirhosis with ascites 1 