Transcranial doppler pulsatility indices as a measure of diffuse small-vessel disease

Chelsea S. Kidwell, Suzie El-Saden, Zhanna Livshits, Neil A. Martin, Thomas C. Glenn, Jeffrey L. Saver

Research output: Contribution to journalArticle

92 Scopus citations

Abstract

Background and Purpose. Elevation in pulsatility indices (Pls) as measured by transcranial Doppler (TCD) have been postulated to reflect downstream increased vascular resistance caused by small-vessel ischemic disease. Methods. The authors retrospectively compared TCD Pls and magnetic resonance imaging (MRI) manifestations of small-vessel disease in 55 consecutive patients who underwent TCD studies and brain MRI within 6 months of each other during a 2-year period. Results. Correlations between TCD middle cerebral artery Pls and MRI measures were as follows: periventricular hyperintensity (PVH) = 0.52 (P < .0001), deep white matter hyperintensity (DWMH) = 0.54 (P < .0001), lacunar disease = 0.31 (P = .02), and combined PVH/DWMHAacunes = 0.54 (P < .0001). Correlation between pontine ischemia and vertebrobasilar Pls was 0.46 (P = .0004). Univariate analysis showed that age, elevated PI, and hypertension strongly correlated with white matter disease measures. After adjusting for these factors in a multivariate Poisson regression analysis, PI remained an independent predictor of white matter disease. Receiver operator curve analyses identified PI cut points that allowed discrimination of PVH with 89% sensitivity and 86% specificity and discrimination of DWMH with 70% sensitivity and 73% specificity. Conclusions. Elevation in Pls as measured by TCD shows strong correlation with MRI evidence of small-vessel disease. TCD may be a useful physiologic index of the presence and severity of diffuse small-vessel disease.

Original languageEnglish (US)
Pages (from-to)229-235
Number of pages7
JournalJournal of Neuroimaging
Volume11
Issue number3
DOIs
StatePublished - Jan 1 2001
Externally publishedYes

Keywords

  • Magnetic resonance imaging
  • Pulsatility indices
  • Small-vessel disease
  • Transcranial Doppler

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Clinical Neurology

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