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Related Experiment Video

Updated: Apr 12, 2026

A Magnetic Resonance Imaging-based Computational Protocol for Analysis of Plaque Morphology and Hemodynamics in Patients with Carotid Artery Stenosis
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Hyperperfusion in carotid stenting patients.

Ayşe Aralasmak1, Musa Atay, Huseyin Toprak

  • 1From the Departments of *Radiology, †Neurology, and ‡Cardiology, Bezmialem Vakif University, Istanbul, Turkey.

Journal of Computer Assisted Tomography
|May 16, 2015
PubMed
Summary

Radiologic hyperperfusion after carotid stenting does not always correlate with clinical symptoms. Reduced hemodynamic reserve, particularly in patients with contralateral stenosis, is a key factor in post-stenting hyperperfusion.

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Area of Science:

  • Neurology
  • Radiology
  • Vascular Surgery

Background:

  • Carotid stenting is a common procedure for managing carotid artery stenosis.
  • Hyperperfusion syndrome can occur post-stenting, leading to potential complications.
  • Defining and understanding hyperperfusion is crucial for patient management.

Purpose of the Study:

  • To define hyperperfusion in carotid stenting patients, including those with contralateral stenosis.
  • To investigate the relationship between radiologic and clinical hyperperfusion.
  • To identify factors contributing to hyperperfusion after carotid stenting.

Main Methods:

  • 32 patients undergoing carotid stenting were analyzed.
  • Computed tomography perfusions were performed pre- and post-stenting.
  • Relative cerebral blood volume, cerebral blood flow, and mean transit time (MTT) were calculated, along with difference MTT (dMTT).

Main Results:

  • Four patients experienced clinical hyperperfusion syndrome; six showed radiologic hyperperfusion.
  • Radiologic hyperperfusion (increased CBF, altered CBV, shortened MTT) did not consistently correlate with clinical symptoms.
  • The normal group showed significant changes in relative MTT (rMTT) and dMTT post-stenting; the hyperperfused group did not.

Conclusions:

  • Radiologic and clinical hyperperfusion are not synonymous after carotid stenting.
  • Contralateral critical stenosis is frequently observed in patients with hyperperfusion.
  • Reduced hemodynamic reserve appears to be the primary driver of hyperperfusion post-carotid stenting.