Background: Coronary artery disease, which is the main cause of death worldwide, is secondary to the atherosclerotic narrowing of the lumen of the artery. A higher angiographic restenosis rate of 58% has been reported after the intervention of long lesions with balloon angioplasty Aim of the study: To evaluate the clinical outcome of long/short stent length (in terms of MACE) at 1 year follow up after Percutaneous coronary intervention. Materials and Methods: An observational prospective study detailed history and after thorough clinical examination of 200 patients. Results: In our study among Long stent (>25 mm), Over all MACE was 16% vs 4 % in short stent group (<25mm) C, it was found that Mean Peak CPK were significantly elevated in both long stent vs short stent. Conclusion: Among the patients who developed MACE, a sub group analysis was done based on stent diameter; which revealed higher incidence of MACE among smaller diameter stents, which is statistically significant.