Background:The several kinds of coronary stents havve proven successful in theirrole to treat acute or subacute closures after balloon angioplasty as well as to reduce the restenosis rate in de novo lesions. However, investigations continue in order to develop an ideal stent with a strong, highly flexible, radial force, especially useful in cases of tortuous vessels, lesions at bends, and lesions distal to previously deployed stents. The NIR stent is a recently developed balloon-expandable, stainless- steel, slotted tube stent; it is designed for improved flexibility with a higher radial force when compared with the traditional Palmaz-Schatz stent. We report the immediate results of our experience with the NIR stent. The purpose of the present study was to assess the feasibility, safety and efficacy of the deployment of manually crimped NIR stents in patients with complex coronary anatomy as well as the clinical outcomes within the first month. Methods:Between January and July 1997, 143 NIR stents were implanted in the coronary arteries of 124 patients(male 76%, mean age 56±10 years. Sixty-one patients had UAP, 43 had SA, and 20 patients had AMI. Results: 1 Indications of stenting were de novo lesions in 123(95% and restenosis lesion in 6(5%. 2 Frequency of used stent length was 16mm in 65 cases(46%, 32mm in 60 cases(42%, 25 mm in 12 cases(8%, and 9mm in 6 cases(4%. 3 Single stents were implanted in 115(89% lesions, and overlapping stenting with 2nd NIR stents in 14(11% lesions.