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[Postural vertigo and basilar artery flow increment].

A Berni1, L Tromba, L Falvo

  • 1Surgical Sciences Department of the La Sapienza , University in Rome, V. le Regina Elena n. 324, 00161 Rome, Italy. alberto.berni@uniroma1.it

Journal Des Maladies Vasculaires
|November 18, 2003
PubMed
Summary
This summary is machine-generated.

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In healthy individuals, cerebral blood flow remains stable during position changes. However, patients with short-term vertigo experience increased basilar artery flow during dizziness episodes.

Area of Science:

  • Neuroscience
  • Cerebrovascular Physiology

Context:

  • Understanding cerebral arterial flow regulation is crucial for neurological health.
  • Short-term vertigo upon postural change can indicate underlying circulatory or regulatory issues.

Purpose:

  • To investigate cerebral arterial flow dynamics in normal individuals and patients with transient vertigo.
  • To analyze changes in cerebral blood flow during postural transitions, specifically sitting up rapidly.

Summary:

  • Transcranial Doppler assessed cerebral artery flow in 16 young, 16 older healthy adults, and 46 vertigo patients.
  • Normal subjects maintained consistent flow across various positions (lying, sitting, Trendelenburg).
  • Vertigo patients exhibited increased basilar artery flow during dizziness, normalizing as symptoms resolved.

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Impact:

  • Demonstrates intact cerebral autoregulation in healthy individuals across postural changes.
  • Suggests altered or reduced cerebrovascular self-regulation, potentially in the carotid circulation, leading to compensatory basilar artery hyperflow in vertigo patients.
  • Highlights potential vertebrobasilar over-response as a mechanism for vertigo-induced flow changes.