Correlation between high perfusion syndrome and stent restenosis after stent implantation

Area of Science:

• Neurology
• Vascular Surgery
• Medical Imaging

Background:

• Cerebral vascular stent implantation is a common procedure for treating stenosis.
• Post-stent restenosis remains a significant clinical challenge.
• Hyperperfusion syndrome is a potential complication following such interventions.

Purpose of the Study:

• To investigate the correlation between high perfusion syndrome and stent restenosis after cerebral vascular stent implantation.
• To identify risk factors associated with stent restenosis.

Main Methods:

• A cohort of 146 patients with cerebral vascular stenosis and stent implantation was studied.
• Xenon-enhanced computed tomography (Xe-CT) and clinical symptoms were used to diagnose cerebral hyperperfusion syndrome within 3 days post-surgery.
• Blood flow changes and restenosis rates were assessed one month and one year post-operation.

Main Results:

• 55 patients (37.67%) were diagnosed with cerebral hyperperfusion syndrome (observation group), while 91 served as controls.
• The observation group showed significantly greater increases in cerebral blood flow.
• Restenosis rates and target lesion diameter were significantly higher in the observation group compared to the control group at one month and one year.
• Multivariate analysis identified high perfusion syndrome, mean systolic blood pressure (mSBP), mean diastolic blood pressure (mDBP), and cerebral vascular diameter stenosis rate as independent risk factors for restenosis.

Conclusions:

• Xenon-enhanced CT is valuable for the early diagnosis of hyperperfusion syndrome.
• Hyperperfusion syndrome is closely associated with the occurrence of stent restenosis.
• Elevated blood pressure, degree of stenosis, and hyperperfusion syndrome are independent risk factors for cerebral stent restenosis.