Cerebral hemodynamics in obstructive sleep apnea.
case_series · Level IV
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- Record sourced from PubMed, PMID 7907537.
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Abstract
We have investigated cerebral blood flow velocity (CBVF) in 14 patients with marked obstructive sleep apnea syndrome using transcranial Doppler ultrasonography during sleep. The CBFV increased during apnea, with a mean acceleration of 0.9 cm/s2, followed by a rapid decrease during snoring. The same effect was obtained by voluntary apnea in healthy subjects, showing a smaller acceleration rate (0.6 cm/s2). These results provide evidence for a normal CO2 regulation of cerebral vessels during sleep apnea and do not support the notion of cerebral hypoperfusion during sleep being a risk factor for stroke.
Medical subject headings
- Cerebrovascular Circulation
- Sleep Apnea Syndromes