obsolete_Vertebrobasilar insufficiency true DOID:223 3.88.0 http://purl.obolibrary.org/obo/MONDO_0001613 Replaced by Mondo term MONDO_0001613, with which this term was previously merged. Use: http://purl.obolibrary.org/obo/MONDO_0001613 MESH:D014715 Sirarat Sarntivijai MedDRA:10047334 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.