Objective To evaluate the safety and efficacy of cutting balloon angioplasty (CBA) for diffuse in-stent restenosis (ISR) in elderly patients.

目的研究切割球囊成形术（CBA）治疗高龄患者弥漫性冠状动脉（冠脉）支架内再狭窄（ISR）的安全性与疗效。

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Objective To evaluate the safety and efficacy of cutting balloon angioplasty (CBA) for diffuse in-stent restenosis (ISR) in elderly patients.

目的研究切割球囊成形术（CBA）治疗高龄患者弥漫性冠状动脉（冠脉）支架内再狭窄（ISR）的安全性与疗效。

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