Sign Up for a Free Account

This is an image preview.
Start a Free Account
to view the full image.

  • Nearly 3,000 illustrations, including video clips of neurologic disorders.

  • Every article is reviewed by our esteemed Editorial Board for accuracy and currency.

  • Full spectrum of neurology in 1,200 comprehensive articles.

  • Listen to MedLink on the go with Audio versions of each article.

Left subclavian steal phenomenon

The proximal part of left subclavian is blocked on the left side. Blood flow is antegrade in the right vertebral artery but retrograde in the left vertebral artery, which supplies the distal left subclavian artery. (Courtesy of Wikimedia Commons. Illustration by User:Rajtheja on July 5, 2013. Creative Commons Attribution-Share Alike 3.0 Unported License,