No abstract available
MeSH terms
-
Aged
-
Brain Ischemia / surgery*
-
Brain Stem / blood supply*
-
Circle of Willis / abnormalities
-
Constriction, Pathologic
-
Female
-
Humans
-
Vertebral Artery / anatomy & histology
-
Vertebrobasilar Insufficiency / etiology
-
Vertebrobasilar Insufficiency / surgery*