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.
(A) Angiogram of the left CCA showing a subocclusive left ICA stenosis. (B) Angiogram of the right ICA showing collateral flow into the left intracranial cerebral circulation through the anterior communicating artery. (C) Angiogram of the left external carotid artery showing retrograde flow through the ophthalmic artery to the left supraclinoid ICA. CCA, common carotid artery; ICA, internal carotid artery.
