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[Violation of cerebral hemodynamics in the cardiac dysfunction caused by chronic heart failure]

M L Mamalyga1, L M Mamalyga2

  • 1Bakulev Center Research of Cardiovascular Surgery, Moscow.

Zhurnal Nevrologii I Psikhiatrii Imeni S.S. Korsakova
|September 11, 2015
PubMed

Insights

Chronic heart failure impacts cerebral blood flow differently across stages. Early stages may increase seizure readiness without altering brain circulation, while later stages reduce blood flow and autoregulation.

Area of Science:

  • Neuroscience
  • Cardiology
  • Physiology

Context:

  • Chronic heart failure (CHF) is a complex condition affecting multiple organ systems.
  • Cerebral hemodynamics can be altered in patients with CHF, but the precise mechanisms and stage-dependent changes are not fully understood.

Purpose:

  • To investigate the dynamic changes in cerebral blood flow and autoregulation during the progression of cardiac dysfunction in a model of chronic heart failure.
  • To determine the relationship between the severity of heart failure and alterations in cerebral hemodynamics and seizure readiness.

Summary:

  • In early stages of cardiac decompensation, cerebral blood flow in carotid and basilar arteries remained unchanged, yet seizure readiness increased, independent of circulatory brain disorders.
  • Advanced heart failure led to decreased blood flow in cerebral arteries, with impaired autoregulation and a progressive rise in seizure readiness.
  • The study utilized echocardiography, ultrasound Doppler, and magnetic resonance imaging in Wistar rats to assess cardiac and cerebral function.

Impact:

  • Findings suggest that the impact of heart failure on cerebral autoregulation varies with disease stage.
  • The rise in seizure readiness during heart failure progression is not solely attributable to cerebral ischemia, highlighting complex neuro-cardiac interactions.
Abstract

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