An official website of the United States government
Here's how you know
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.
Vasospasm before and after angioplasty. A – angiogram with vasospasm in the middle cerebral artery territory (thin arrows); B – angiogram after angioplasty with improvement in vasospasm (thick arrows)