Impact of intracranial artery calcification on cerebral hemodynamic changes

Xiaohong Wu, Li Wang, Jingxin Zhong, Jacky Ko, Lin Shi, Yannie Soo, Thomas Leung, Ka Sing Wong, Jill Abrigo, Xiangyan Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)

Abstract

Purpose: Intracranial artery calcification (IAC) has been demonstrated to be correlated with ischemic stroke, cognitive decline, and other vascular events by accumulating evidences from both Western and Asian populations. The proposed study aimed to investigate its potential mechanisms by evaluating the blood flow velocity and pulsatility index (PI) of cerebral arteries. Methods: Consecutive ischemic stroke patients admitted to the Prince of Wales Hospital were recruited after excluding those with atrial fibrillation or poor temporal window. Quantitative measurements of IAC severity were assessed on brain CT scans. Transcranial Doppler (TCD) ultrasonography was performed to evaluate the blood flow velocity of the middle cerebral artery (MCA) and vertebral-basilar artery (VBA). Results: In total, 318 patients were analyzed. Spearman’s correlation analysis demonstrated both high MCA systolic flow velocity and high MCA PI were correlated with IAC Agatston score, p < 0.001 individually. Similar correlation was also found between IAC Agatston score and high VBA velocity/high VBA PI, p ≤ 0.001 individually. Multiple logistic regression analysis showed IAC Agatston score was an independent risk factor for high MCA velocity (OR 1.533; 95% CI 1.235–1.903), high VBA velocity (OR 1.964; 95% CI 1.381–2.794), and high VBA PI (OR 1.200; 95% CI 1.016–1.418), respectively. Conclusion: Heavier IAC might cause generalized artery flow velocity changes and increased pulsatility index, which may indicate high resistance within cerebrovasculature.

Original languageEnglish
Pages (from-to)357-363
Number of pages7
JournalNeuroradiology
Volume60
Issue number4
Early online date9 Feb 2018
DOIs
Publication statusPublished - Apr 2018
Externally publishedYes

Keywords

  • Computed tomography cerebral blood flow velocity
  • Intracranial arterial calcification
  • Ischemic stroke
  • Pulsatility index

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Clinical Neurology
  • Cardiology and Cardiovascular Medicine

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