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Medical AI Inquiry: You was designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.  Labels: BACKGROUND, METHODS, RESULTS. Meshes: Angioplasty, Balloon, Brachytherapy, Coronary Angiography, Coronary Restenosis, Dilatation, Pathologic, Female, Humans, Hyperplasia, Linear Models, Male, Middle Aged, Recurrence, Retrospective Studies, Stents, Treatment Outcome, Tunica Intima, Ultrasonography, Interventional.
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Does acute lumen overdilation improve outcome after brachytherapy of in-stent restenosis? Context: The aim of our study was to test the impact of acute lumen overdilation on neointimal hyperplasia and late lumen size after vascular brachytherapy for in-stent restenosis (ISR). Forty-seven ISR lesions located in 47 coronary arteries in 44 consecutive patients underwent beta brachytherapy with serial intravascular ultrasound studies. Vessel, lumen, and stent cross-sectional area were measured at 1-mm steps. Based on an interpolated reference cross-sectional area, each cross section was assessed as overdilated (lumen cross-sectional area>interpolated reference cross-sectional area) or not overdilated (lumen cross-sectional area <interpolated reference cross-sectional area). Overall, 502 sections were overdilated and 673 sections were not. Overdilated sections had a larger final lumen cross-sectional area (8.02+/-1.98 vs. 6.90+/-2.23 mm2, P<.001) and more recurrent neointimal hyperplasia (1.59+/-2.17 vs. 0.31+/-1.79 mm2, P<.001), but a smaller follow-up area stenosis (-1.03+/-32.99% vs. 22.15+/-20.75%, P<.001). This was especially true in smaller arteries (angiographic reference<3.0 mm) where larger follow-up lumen cross-sectional area and a corresponding smaller area stenosis were present (5.38+/-1.98 vs. 4.84+/-1.88 mm2 and 6.90+/-31.57% vs. 28.61+/-21.86%, P<.01 and P<.001, respectively).
assistant
Especially in small arteries, the strategy of acute lumen overdilation during balloon angioplasty prior to beta vascular brachytherapy treatment of ISR lesions has a favorable long-term result. Final Decision: yes