Micro stent I, initial results, and six months follow-up by quantitative coronary angiography

✍ Scribed by Schalij, Martin J. ;Savalle, Lucas H. ;Tresukosol, Damras ;Jukema, J. Wouter ;Reiber, Johan H. C. ;Bruschke, Albert V. G.

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 73 KB
• Volume: 43
• Category: Article
• ISSN: 0098-6569
• DOI: 10.1002/(sici)1097-0304(199801)43:1<19::aid-ccd6>3.0.co;2-b

✦ Synopsis

The Micro stent TM (MS) is a balloon expandable stent that allows the treatment of stenoses in distal and tortuous coronary arteries. This prospective study was performed to evaluate initial and late results of MS implantations. A total of 127 MS (101 in native coronary arteries and 26 in saphenous vein grafts) were implanted in 85 patients (1.5 stents/pt, 65 male, and 20 female, age 62, ؎10 yr) with angina pectoris class II-III: 21 (25%), angina pectoris class IV: 41(48%), and acute myocardial infarction: 23 (27%). Indications per segment treated (n‫:)39؍‬ elective: 49 (53%); suboptimal balloon angioplasty (PTCA) result: 33(35%); bailout: 11 (12%). The patients were discharged with 100 mg of aspirin daily unless other indications for oral anticoagulants were present. Procedural success (diameter stenosis of 30% without the occurrence of clinical events within 3 wk) was 85%. Early clinical events (F3 wk included: death:1%; subacute closure: 5%; coronary artery bypass surgery (CABG): 1%; vascular complications: 4%. Late clinical events (3 wk-6 mo) included: acute myocardial infarction:3%, PTCA 5%, CABG 3%, angina class III-IV: 4%. Quantitative angiographic results were: the minimum lumen diameter increased from 0.90 ؎ 0.72 before to 3.05 ؎ 0.48 mm (FP0.001) after stent implantation. At follow-up, which was 5.5 mo ؎ 1.1 mo, 61/79 pts (77%), the loss in diameter was 0.90 ؎ 0.68 mm. The net gain was 1.26 ؎ 0.90 mm. The restenosis rate (diameter stenosis G 50% at FU) was 13%. This study demonstrates high procedural and late success rates of Micro stent implantations.