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29 - Monitoring carotid interventions with xenon CT

from Monitoring the local and distal effects of carotid interventions

Published online by Cambridge University Press:  03 December 2009

By
Andrew Carlson  and
Howard Yonas
Edited by
Jonathan Gillard ,
Martin Graves ,
Thomas Hatsukami  and
Chun Yuan
Andrew Carlson
Affiliation:
University of New Mexico, Albuquerque NM, USA
Howard Yonas
Affiliation:
University of New Mexico, Albuquerque NM, USA
Jonathan Gillard
Affiliation:
University of Cambridge
Martin Graves
Affiliation:
University of Cambridge
Thomas Hatsukami
Affiliation:
University of Washington
Chun Yuan
Affiliation:
University of Washington
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Summary

Introduction

Our knowledge of cerebral hemodynamics during carotid occlusion is derived from several pathophysiologically different clinical situations understood via myriad imaging and assessment modalities. This leads to what, at the outset, seems to be a vast and conflicting body of literature regarding the field. Our goal here is first, to carefully explore the physiologic information gained in these various clinical situations and second, to apply these principles, in so far as the available evidence allows, to patient care. It is important to understand that each of these disparate situations and technologies seek to offer some insight into the large picture of how cerebral blood flow (CBF) responds to various challenges. By focusing too closely on the minutia of any particular situation or technology without incorporating the alternate perspectives offered by other situations or technologies, one runs the risk of losing understanding of this larger picture.

There are two clinical scenarios in which we have gained our most extensive understanding of cerebral hemodynamics in relation to carotid occlusion. One is when the carotid artery is intentionally occluded as a test of tolerance to permanent occlusion (balloon test occlusion or BTO). The other involves the study of patients that present with chronic carotid occlusion who are objects of study in order to assess their risk for future stroke. Patients undergoing BTO are initially asymptomatic and temporary occlusion of the carotid provides the most “pure” study of cerebral hemodynamics – i.e. the physiological response to an abrupt carotid occlusion.

Keywords

balloon test occlusioncarotid occlusioncerebral blood flowMRIxenon computerized tomographypositron emission tomography
Type
Chapter
Information
Carotid Disease
The Role of Imaging in Diagnosis and Management
 , pp. 396 - 417
Publisher: Cambridge University Press
Print publication year: 2006

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