The part of PCI has been developing in the course of the most recent twenty years. Coronary stent implantation has improved clinical result of diabetic patients contrasted and expand angioplasty, principally as the aftereffect of a decrease in intense inconveniences and restenosis rate. Present investigation planned to decide the momentary results as respects major antagonistic heart and cerebral occasions MACE: (passing, intense coronary disorder: myocardial localized necrosis and temperamental angina ,cerebrovascular stroke, target vessel revascularization) in diabetic patients when contrasted with single vessel ailment and multi vessel malady going through elective percutaneous coronary mediation (PCI) The current examination was directed on 60 patients alluded to the catheterization research center division at Benha University Hospital for elective PCI. Patients were sub partitioned into 2 gatherings: Group A: 30 diabetic patients with single vessel infection. Gathering B: 30 diabetic patients with multi vessel infection. Every patient was followed up clinically for a quarter of a year after elective PCI. The enlistment was done from April 2018 to September 2018 in Benha University Hospital. As per standard segment and clinical qualities contrasts was not huge between the two gatherings. Likewise, there was no distinction in hazard factors conveyance between the two gatherings. At long last, after PCI in the two gatherings the outcomes in present moment follow up was that frequency of MACEs in multi vessel bunch was higher than single vessel group.10% was the rate of MACE in bunch B while it was 3% in bunch A. One case kicked the bucket in bunch B while no passing was recorded at bunch A. Chest torment was more recorded at bunch B by 3 cases while 1 case at bunch A. The examination indicated higher occurrence of momentary dismalness and mortality in diabetic patients go through PCI with numerous vessel sickness more than single vessel maladyKey words: CAD risk factors, Coronary angiography, percutaneous intervention.