Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Same case as Fig. 4. (A) Right carotid artery injection in frontal view, during balloon occlusion test (BOT) of left internal carotid artery (ICA), shows absence of cross-flow. (B) Left vertebral artery injection, lateral view, during BOT of left ICA shows an hypoplastic posterior communicating artery, with slight opacification of the supraclinoid portion of left ICA and absence of flow in left middle cerebral artery vascular territory.
