disease has feature vertebrobasilar insufficiency https://www.malacards.org/card/vertebrobasilar_insufficiency MONDO:0001613 UMLS:C0042568 MESH:D014715 vertebrobasilar insufficiency MEDGEN:12075 icd11.foundation:1570524591 ICD9:435.3 DOID:13003 EFO:1001449 vertebrobasilar artery syndrome vertebrobasilar arterial insufficiency SCTID:195199008 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. transient ischemic attack brain ischemia vascular insufficiency disorder