Transcranial Doppler study of cerebral arteriovenous malformations after gamma knife radiosurgery

Journal of Clinical Neuroscience : Official Journal of the Neurosurgical Society of Australasia
Seong-Hyun Park, Sung-Kyoo Hwang

Abstract

The aim of this study was to evaluate the clinical value of the Transcranial Doppler (TCD) in follow-up examinations after gamma knife radiosurgery (GKS) for arteriovenous malformations (AVM). We performed TCD after GKS in 18 patients who had cerebral AVMs to evaluate the hemodynamic effects of the procedure. Ten patients underwent TCD within 12 months after GKS, and eight between 12 and 24 months. The mean blood velocity (Vm) and pulsatility index (PI) were primarily analyzed in the feeding arteries (FAs) and non-FAs. Fifteen healthy volunteers served as control patients. The Vm values in the FAs after GKS ranged from 31 cm/s to 90 cm/s, with PI values ranging from 0.48 to 1.03. The Vm values in the comparable normal arteries ranged from 28 cm/s to 87 cm/s, and the PI values in these arteries ranged from 0.62 to 1.02. The Vm and PI values in every FA in all patients were normal compared to the values in the non-FAs (p=0.67 and 0.38, respectively). Our results suggest that AVM vessels with high Vm and low PI values return to normal as the nidus of the AVM is obliterated after GKS. Although there was a trend toward a reduction of the Vm values after obliteration, this trend was not significant, except when the < 12 month subgrou...Continue Reading

References

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Citations

Jan 24, 2014·International Journal of Vascular Medicine·Jawad NaqviJonathan Ghosh
May 15, 2016·Journal of Clinical Neuroscience : Official Journal of the Neurosurgical Society of Australasia·Kathryn J BuschMichael Kerin Morgan

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