[Evaluation of cerebral hemodynamics in patients with syndrome of obstructive sleep apnea by long term registration of rheoencephalogram].
OBJECTIVE
To assess cerebral hemodynamics during sleep in patients with syndrome of obstructive sleep apnea.


METHODS
Long term monitoring of rheoencephalogram. Data processing consisted in construction of trends (curves of changes of rheographical parameters during any selected time interval).


CONCLUSIONS
Cyclical periods of apnea are associated with negative changes of cerebral hemodynamics. At the end of period of apnea despite compensatory vasodilatation cerebral blood flow decreases. This occurs during pronounced hypoxemia and can predispose to ischemic disturbances. In ventilation phase rapid rise of heart rate and blood pressure at the background of continuing cerebral vasodilatation can increase risk of hemorrhagic complications.
Buzunov
R V
RV
Presidential Medical Center of Russia Central Clinical Hospital, 15 Marshala Timoshenko, 121356 Moscow, Russia.
Eroshina
V A
VA
Shubin
A B
AB
Pospelov
D Iu
DIu
D002560:Cerebrovascular Circulation / Q000502:physiology; D004569:Electroencephalography / Q000379:methods; D006801:Humans; D008991:Monitoring, Physiologic / Q000379:methods*; D010992:Plethysmography, Impedance; D012890:Sleep / Q000502:physiology; D020181:Sleep Apnea, Obstructive / Q000175:diagnosis* / Q000503:physiopathology*; D013577:Syndrome