Definitions for vertebrobasilar insufficiency

This page provides all possible meanings and translations of the word vertebrobasilar insufficiency


  1. Vertebrobasilar insufficiency

    Vertebrobasilar insufficiency, or vertebral basilar ischemia, refers to a temporary set of symptoms due to decreased blood flow in the posterior circulation of the brain. The posterior circulation supplies blood to the medulla, cerebellum, pons, midbrain, thalamus, and occipital cortex. Therefore, the symptoms due to VBI vary according to which portions of the brain experience significantly decreased blood flow. In the United States, 25% of strokes and transient ischemic attacks occur in the vertebrobasilar distribution. These must be separated from strokes arising from the anterior circulation, which involves the carotid arteries.

U.S. National Library of Medicine

  1. Vertebrobasilar Insufficiency

    Localized or diffuse reduction in blood flow through the vertebrobasilar arterial system, which supplies the BRAIN STEM; CEREBELLUM; OCCIPITAL LOBE; medial TEMPORAL LOBE; and THALAMUS. Characteristic clinical features include SYNCOPE; lightheadedness; visual disturbances; and VERTIGO. BRAIN STEM INFARCTIONS or other BRAIN INFARCTION may be associated.

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