Haemodynamic aspects of clinical cerebral angiography. Concurrent two vessel monitoring using transcranial Doppler ultrasound

Acta neurochirurgica
H NornesK F Lindegaard

Abstract

To overcome the technical limitations which have precluded noninvasive Doppler ultrasound in investigation of rapid cerebral haemodynamic responses in two cerebrovascular beds at the same time, we have modified a commercial 2 MHz pulsed Doppler instrument with online spectrum analysis. Two probes are activated intermittently, recording eight averaged Doppler-shifted spectra from each probe sequentially. Concurrent recordings of blood velocity in both middle cerebral arteries were performed during 25 selective iohexol carotid angiography runs in 13 patients with near normal cerebral vasculature. The technique permitted the differentiation between the specific responses confined to the recipient vascular bed, and the general responses occurring in remote brain areas as well. The specific response to iohexol was biphasic; a significant decrease in blood velocity occurred less than 4 s after the bolus entry, probably due to the high viscocity of iohexol. Between 4 and 12 s. blood velocity was significantly increased, reflecting the cerebrovascular response to hypertonic solutions. The blood velocity on the opposite side increased from less than 4 s through 45 s after iohexol. This concurs with studies using electromagnetic flowmetr...Continue Reading

References

Oct 1, 1978·Scientific American·N A LassenE Skinhøj
Jan 1, 1989·Stroke; a Journal of Cerebral Circulation·R AaslidH Nornes
Jan 1, 1989·Acta neurochirurgica·K F LindegaardP Nakstad
Apr 1, 1987·Journal of Cerebral Blood Flow and Metabolism : Official Journal of the International Society of Cerebral Blood Flow and Metabolism·R C GurM Reivich
Sep 1, 1986·Journal of Neurosurgery·K F LindegaardH Nornes
Jan 1, 1982·Investigative Radiology·T W MorrisR W Katzberg

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Citations

Jan 1, 1996·Acta neurochirurgica·A SortebergH Nornes
Jun 19, 2010·Journal of Neurology·Sarah ToledanoMathieu Zuber
Aug 2, 2014·Journal of Clinical Neuroscience : Official Journal of the Neurosurgical Society of Australasia·Brian P WalcottChristopher S Ogilvy
Oct 29, 2010·Medical Engineering & Physics·G MulderF N van de Vosse
Mar 20, 2008·Cerebrovascular Diseases·Jeroen HendrikseJeroen van der Grond
Feb 1, 1992·Stroke; a Journal of Cerebral Circulation·N J Brautaset
Jun 28, 2011·Journal of Liposome Research·Philippe GentineBenoît Frisch
Oct 23, 2004·Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine·Osman KizilkilicFahri Tercan
May 9, 2000·Journal of Neuroimaging : Official Journal of the American Society of Neuroimaging·V L BabikianA V Alexandrov

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