Evaluating the effect of transcranial Doppler on stent-assisted angioplasty and restenosis of intracarotid artery

Objective To evaluate the effect of transcranial Doppler(TCD) on stent-assisted angioplasty and restenosis of intracarotid artery.Methods Eighty-five patients with cerebral infarction or transient ischemic attack(TIA) were confirmed with severe intracarotid artery stenosis by digital subtraction angiography(DSA).Before stent-assisted angioplasty and after treatment successfully in 3 and 180 days,TCD detected the peaking of systolic velocity(Vs),frequency spectrum and acoustic frequency in middle cerebral artery(MCA),internal carotid artery(ICA1),vertebral artery(VA) and basal artery(BA).Results The diagnosis was coincidence between DSA and TCD before and treatment stent-assisted angioplasty successfully in 85 patients.Three cases developed intracarotid artery restenosis at stent placement detected by TCD,the rate of stenosis within stent 50% by DSA in 6 months.Compared with before stent-assisted angioplasty,the value of Vs was slower in MCA,ICA1,VA and BA of 85 patients which received stent plasty successfully after 3 days(P0.01).The eddy and noise were disappeared,the form of frequency spectrum was improved.It were not significant compared with 180 days after management(P0.05).Conclusion TCD is a sensitive means for clinical to evaluate the effect of intracarotid artery stent-assisted angioplasty,restenosis and a tool of follow-up.