Cerebral haemodynamics in internal carotid artery trial occlusion

Acta neurochirurgica
A SortebergH Nornes

Abstract

The purpose of this study was to analyse the cerebral haemodynamic changes brought about by trial occlusion of the internal carotid artery (ICA). Sixteen patients with surgically inaccessible cerebral aneurysms, carotid cavernous fistulas or neck neoplasms were monitored with transcranial Doppler ultrasonography (TCD) during 90-120 s angiographic ICA balloon occlusion or ICA closure with a Selverstone clamp. The blood velocity (V) was registered continuously in both middle cerebral arteries (MCA) while the pulsatility index (PIMCA) and haemodynamic tension (Uhem MCA) were calculated. ICA closure led to an instantaneous drop in the ipsilateral VMCA, PIMCA and Uhem MCA. The VMCA thereafter increased gradually until reaching a stable level. The subjects were grouped into those with initial drops in VMCA to > or = 60% of pre-occlusion value (group 1) and those that fell to < 60% (group 2), respectively. In group 1 autoregulatory mechanisms made the PIMCA decline further, while the Uhem MCA remained unaltered during ICA closure. In group 2, however, the PIMCA did not change further, while the Uhem MCA increased slightly. The cerebral haemodynamic features during ICA test occlusion were thus essentially different in the two groups. O...Continue Reading

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Citations

Nov 22, 2011·Journal of Stroke and Cerebrovascular Diseases : the Official Journal of National Stroke Association·Michael R LevittBasavaraj V Ghodke
Feb 8, 2005·Neurosurgery Clinics of North America·Richard J ParkinsonH Hunt Batjer
Feb 5, 2003·Neurological Research·Jun ZhongHongliang Fu
Oct 1, 2008·Neurosurgery·Angelika SortebergWilhelm Sorteberg
Sep 6, 2019·Neurosurgical Review·Torstein R Meling, Gildas Patet
Aug 19, 2017·Neurosurgical Review·Torstein R Meling
Sep 2, 2017·Current Atherosclerosis Reports·Konark MalhotraGeorgios Tsivgoulis

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