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The influence of atherosclerosis and ectasia on cerebral blood flow
Insights
Cerebral blood flow (CBF) was assessed in neurological patients with vascular changes. Atherosclerosis and ectasia did not significantly alter CBF, though values were slightly lower than normal.
Area of Science:
- Neurology
- Vascular Medicine
- Radiology
Background:
- Neurological disorders can be associated with cerebrovascular changes.
- Assessing cerebral blood flow (CBF) is crucial for understanding neurological conditions.
Purpose of the Study:
- To investigate the relationship between specific cerebrovascular changes and hemispherical regional cerebral blood flow (rCBF).
- To determine if atherosclerosis or arterial ectasia impacts rCBF in patients with neurological disorders.
Main Methods:
- Rapid serial angiography of the carotid artery was used to identify vascular changes in 65 neurological patients.
- Hemispherical rCBF was determined using the 133Xenon clearance method.
- Statistical analysis, including multiple regression, was performed on rCBF, arterial size, ventricular size, circulation time, age, and sex.
Main Results:
- No significant differences in rCBF were found between patients with ectasia, atherosclerosis, normal arteries, or combined vascular changes.
- Mean rCBF values were slightly lower in patients with atherosclerosis and intracranial ectasia compared to the normal group, but not significantly.
- Internal carotid artery stenosis, whether marked or slight, did not significantly influence rCBF.
Conclusions:
- Cerebral atherosclerosis and arterial ectasia, common vascular changes in neurological patients, do not cause statistically significant reductions in hemispherical rCBF.
- Further research may be needed to explore subtle hemodynamic effects or other contributing factors to neurological dysfunction in these patients.
Abstract:
Of 65 patients with neurological disorders examined with rapid serial angiography of the carotid artery, 24 had normal cerebral arteries, 17 atherosclerosis, 11 arterial ectasia and 13 both kinds of vascular changes. These patients were examined for hemispherical rCBF determination on the same occasion, using the 133Xenon clearance method. Primarily, the patients were examined without general anaesthesia, and they did not have acute illness, trauma, or angiographic evidence of a focal intracranial lesion. In addition, other parameters such as arterial size, ventricular size, cerebral circulation time, age, and sex were determined. All these data were studied statistically in a series of multiple regression analyses with a computer. No significant differences in rCBF could be found between cases with ectasia, atherosclerosis and without any kind of vascular changes. However, the mean value of rCBF in patients with atherosclerosis and in patients with intracranial ectasia was below the normal mean value, although it did not differ significantly from this value. Nor was any influence on the rCBF found in patients with marked stenosis of the internal carotid artery and those with slight stenosis.