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AUTOREGULATION OF BRAIN CIRCULATION IN PROGRESSING CARDIAC FAILURE AND ITS RELATION TO THE APPEARANCE OF SEIZURE READINESS
On the early stage of cardiac decompensation, the blood flow in common carotid and basilar arteries does not change, however the seizure readiness (SR) of animals increases. The preserved reaction on hypercapnic and compression tests allows us to stipulate that the increased SR is not related to the circulatory brain disorders. Progressive aggravation of cardiac failure (CF) leads to the severe stage of decompensation accompanied by decreased blood flow in common carotid and basilar arteries, as well as increases SR. At the same time the metabolic cascade of autoregulation is areactive and myogenic is significantly decreased. Ineffective operation of heart in different stages of heart failure shows not the same effect or backup possibilities for cerebral hemodynamic autoregulation affecting the formation and aggravation of SR. The increased SR in cardiac failure is not always caused by brain ischemia.
Keywords: autoregulation of brain circulation, cardiac failure, seizure readiness
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