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• W1977163955 abstract "The aim of this study was to evaluate the influence of vessel dilation on restenosis after successful percutaneous transluminal coronary angioplasty (PTCA) on the basis of quantitative angiographic analysis. To have the best comparison possible, we restrospectively studied a homogenous series of patients from the early 1980s treated according to a standardized PTCA procedure. The study group consisted of 86 patients with stable angina pectoris and single-vessel disease, all of whom underwent successful PTCA for a short concentric lesion in proximal vessel parts. The overall restenosis rate was 27%. Angiographically measured balloon size remained below specifications. The size of the inflated balloon at the site of minimal lumen diameter averaged 2.6 +/- 0.5 mm, and nominal balloon size was 3.3 +/- 0.4 mm (p < 0.001). In 22 patients with an oversized balloon (mean balloon/artery ratio 1.1 +/- 0.16) the restenosis rate was 5% compared with 34% in the corresponding group (p = 0.02). Minimal lumen diameters that were similar after the procedure (2.4 +/- 0.3 vs 2.3 +/- 0.4, NS) were 2.3 +/- 0.4 mm and 1.8 +/- 0.7 mm, respectively, at follow-up (p = 0.002). Multivariate analysis revealed balloon/vessel size ratio (p < 0.001), postprocedure diameter stenosis (p = 0.02), and percentage diameter increase produced by PTCA (p = 0.04) as independent correlates of the late outcome. Postangioplasty minimal lumen diameter was not related to restenosis. The strongest and most significant predictor of late PTCA outcome both by univariate and multivariate analysis was balloon/vessel size ratio, especially when balloon expansion at the site of minimal lumen diameter was regarded. In patients with continued success at follow-up, the ratio was 0.81 +/- 0.15 compared with 0.60 +/- 0.11 in patients with restenosis (p < 0.001). Our results suggest that the late angiographic outcome of PTCA is strongly influenced by procedural factors. It appears that in a selected group of patients, an increased balloon/artery ratio, supposedly associated with increased vessel wall stretch, favorably affects the restenosis process." @default.
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• W1977163955 date "1996-05-01" @default.
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• W1977163955 title "Influence of vessel dilatation on restenosis after successful percutaneous transluminal coronary angioplasty" @default.
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• W1977163955 doi "https://doi.org/10.1016/s0002-8703(96)90169-6" @default.
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