摘要Background Moyamoya disease(MMD)is a significant cause of childhood stroke and transient ischemic attacks(TIAs).This study aimed to assess the safety and efficacy of remote ischemic conditioning(RIC)in children with MMD.Methods In a single-center pilot study,46 MMD patients aged 4 to 14 years,with no history of reconstructive surgery,were randomly assigned to receive either RIC or sham RIC treatment twice daily for a year.The primary outcome measured was the cumulative incidence of major adverse cerebrovascular events(MACEs).Secondary outcomes included ischemic stroke,recurrent TIA,hemorrhagic stroke,revascularization rates,and clinical improvement assessed using the patient global impres-sion of change(PGIC)scale during follow-up.RIC-related adverse events were also recorded,and cerebral hemodynamics were evaluated using transcranial Doppler.Results All 46 patients completed the final follow-up(23 each in the RIC and sham RIC groups).No severe adverse events associated with RIC were observed.Kaplan-Meier analysis indicated a significant reduction in MACEs frequency after RIC treatment[log-rank test(Mantel-Cox),P=0.021].At 3-year follow-up,two(4.35％)patients had an ischemic stroke,four(8.70％)experienced TIAs,and two(4.35％)underwent revascularization as the qualifying MACEs.The clinical improve-ment rate in the RIC group was higher than the sham RIC group on the PGIC scale(65.2％vs.26.1％,P＜0.01).No statistical difference in cerebral hemodynamics post-treatment was observed.Conclusions RIC is a safe and effective adjunct therapy for asymptomatic children with MMD.This was largely due to the reduced incidence of ischemic cerebrovascular events.