High Spatial Inhomogeneity in the Intima-Media Thickness of the Common Carotid Artery is Associated with a Larger Degree of Stenosis in the Internal Carotid Artery: The PARISK Study

J Steinbuch, A C van Dijk, F H B M Schreuder, M T B Truijman, A A J de Rotte, P J Nederkoorn, A van der Lugt, E Hermeling, A P G Hoeks, W H Mess

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Abstract

Purpose: Inhomogeneity of arterial wall thickness may be indicative of distal plaques. This study investigates the intra-subject association between relative spatial intima-media thickness (IMT) inhomogeneity of the common carotid artery (CCA) and the degree of stenosis of plaques in the internal carotid artery (ICA). Materials and Methods: We included 240 patients with a recent ischemic stroke or transient ischemic attack and mild-to-moderate stenosis in the ipsilateral ICA. IMT inhomogeneity was extracted from B-mode ultrasound recordings. The degree of ICA stenosis was assessed on CT angiography according to the European Carotid Surgery Trial method. Patients were divided into groups with a low (≤ 2 %) and a high (> 2 %) IMT inhomogeneity scaled with respect to the local end-diastolic diameter. Results: 182 patients had suitable CT and ultrasound measurements. Relative CCA-IMT inhomogeneity was similar for the symptomatic and asymptomatic side (difference: 0.02 %, p = 0.85). High relative IMT inhomogeneity was associated with a larger IMT (difference: 235 µm, p < 0.001) and larger degree of ICA stenosis (difference: 5 %, p = 0.023) which remained significant (p = 0.016) after adjustment for common risk factors. Conclusion: Regardless of common risk factors, high relative CCA-IMT inhomogeneity is associated with a greater degree of ICA stenosis and is therefore indicative of atherosclerotic disease. The predictive value of CCA-IMT inhomogeneity for plaque progression and recurrence of cerebrovascular symptoms will be determined in the follow-up phase of PARISK.

Original languageEnglish
Pages (from-to)523-529
Number of pages7
JournalUltraschall in der Medizin - European Journal of Ultrasound
Volume38
Issue number5
DOIs
Publication statusPublished - Oct 2017

Keywords

  • carotid arteries
  • ultrasound 2D
  • arteriosclerosis
  • IMT inhomogeneity
  • stroke/TIA
  • CARDIOVASCULAR RISK
  • INTRACEREBRAL HEMORRHAGE
  • STROKE RECURRENCE
  • BLOOD-PRESSURE
  • B-MODE
  • IMT
  • ULTRASOUND
  • INFARCTION
  • ATHEROSCLEROSIS
  • ENDARTERECTOMY

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