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Optimized strategy of rotational atherectomy of underexpanded coronary stents in patients with acute coronary syndrome

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World Journal of Emergency Medicine 2021年第3期12卷 198-201页

作者： Kun Cui You-quan Shi Yuan-zheng Zhang Zheng-gong Li Chang-ling Li Department of Cardiology Chongqing General HospitalChongqing 400013China Department of Cardiology the Third People’s Hospital of Xinjiang Uygur Autonomous RegionUrumqi 830000China Department of Cardiology the First People’s Hospital of TianshuiTianshui 741000China Department of Cardiology the Second Affi liated Hospital of Zhejiang University School of MedicineHangzhou 310009China

BACKGROUND:stent under-expansion is a main cause of acute coronary syndrome(ACS),which can lead to serious clinical outcomes.The rotational atherectomy of underexpanded coronary stents(academically called stent ablation,SA)by intravascular ultrasound(IVUS)may provide more visual reference in the intervention.We aim to analyze the procedural and long-term outcomes of the optimized strategy of SA in patients with ACS and to provide real-world data on this technique.METHODS:A total of 11 patients with ACS who underwent SA between April 2017 and January 2019 were analyzed.Clinical follow-ups were obtained either by telephone call or by scheduled visit.Clinical end-points included periprocedural and postprocedural myocardial infarction,stent thrombosis,target lesion revascularization,and major adverse cardiac events.RESULTS:The mean age of patients was 69.6±6.5 years,and five(45.5%)patients were males.All cases presented with unstable angina and were admitted with ACS.All patients required at least two burrs during the intervention and the size of the burr was selected based on the data of minimum lumen diameter(MLD),and the fi rst and the second burr/stent MLD ratios were 0.93(0.88-0.99)and 1.09(1.02-1.14),respectively.Nine patients were treated with drug-eluting stents and two were treated with drug-coated balloons.There were no complications including no fl ow,perforation,or burr entrapment during the intervention.No in-hospital deaths or major adverse cardiac events were documented during the follow-up period.In our study,less contrast agent and a lower dose of radiation were used during the intervention.CONCLUSIONS:SA guided by IVUS can reduce the risk of complications,assess the results of surgery,inform the selection of stent size,and decrease the required dose of radiation and contrast.

关键词： Acute coronary syndrome Intravascular ultrasound Rotational atherectomy underexpanded stent

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