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This study was retrospectively designed to examine if the Wiktor stent, a balloon-expandable tantalum coil stent, provides a more favorable procedural and long-term clinical and angiographic outcome than does conventional coronary balloon angioplasty (POBA). From April 1995 to April 1996, we implanted 56 Wiktor stents in 46 lesions (LAD: 23, RCA: 16, CX: 7) in 42 patients (average age 53 +/- 10 years). Coronary lesions from the stent group were matched with similar lesions of another 42 POBA patients whose characteristics were identical to the Wiktor group. Revascularization indications in the Wiktor and POBA groups, respectively, were recent myocardial infarction (RMI) (45%, 40%), unstable (31%, 39%) and stable (24%, 21%) angina pectoris. 7% of the stents and 17% of the POBA balloons were less than 3 mm in diameter (p &gt; 0.05). Procedural success was significantly greater in the Wiktor group than in the POBA group (100% vs. 92%, p &lt; 0.05). Neither major cardiac event (death, CABG, acute myocardial infarction) nor (sub)acute occlusion was encountered in the Wiktor group during the hospitalization period and 1 month follow-up. There was 1 urgent CABG and 4 subacute occlusions in the POBA group. Control angiography at 8 months was performed in patients of both groups, of whom some were symptomatic at long-term follow-up or completely event free for 8 months. Angiographic restenosis (&gt; 50% diameter stenosis) occurred in 25% of the Wiktor patients and in 43% of those in the POBA group (p &lt; 0.05). For an 18 month clinical follow-up, 91% of the patients in the Wiktor group were asymptomatic and without ischemia in radionuclide imaging (RI), whereas 79% of the POBA patients were angina-free and 74% were without ischemia in the RI study. In conclusion, Wiktor stent implantation, with no major cardiac event or subacute occlusion, provides a more favorable procedural and long-term clinical and angiographic outcome than does conventional POBA.

japanese heart journal

Comparative Clinical and Angiographic Analysis of the Initial Efficacy and Long-term Follow-up of Wiktor Stent Implantation with Conventional Balloon Angioplasty.