1. Cerebral vasomotor reactivity and apnea test in symptomatic and asymptomatic high-grade carotid stenosis
- Author
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Lučić-Prokin Aleksandra, Slankamenac Petar, Kovačević Pavle, Ružička-Kaloci Svetlana, and Živanović Željko D.
- Subjects
carotid artery diseases ,vasomotor system ,transcranial Doppler ultrasonography ,breath holding ,Medicine - Abstract
Introduction. Cerebral vasomotor reactivity (VMR) represents an autoregulatory response of the arterial trunks on the specific vasoactive stimuli, most commonly CO2. Objective. The aim of this retrospective study was to compare VMR in high-grade symptomatic (SCAS) and asymptomatic carotid stenosis (ACAS), using the apnea test to evaluate the hemodynamic status. Methods. The study included 50 patients who were hospitalized at the neurology and vascular surgery departments as part of preparation for carotid endarterectomy. We evaluated VMR by calculating the breath holding index (BHI) in 34 patients with SCAS and 16 patients with ACAS, with isolated high-grade carotid stenosis. We evaluated the impact of risk factors and collateral circulation on BHI, as well as the correlation between the degree of carotid stenosis and BHI. Results. A pathological BHI was more frequent in the SCAS group (p
- Published
- 2015
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