Subclavian Steal Syndrome (SSS)


Subclavian steal syndrome (SSS) is a condition in which there is retrograde flow down one of the vertebral arteries (to the subclavian) at the expense of the supplying blood to the basilar artery. It is for this reason that this condition presents with:

  • Different blood pressure readings in arms (one side will have a higher blood pressure because it is “stealing” flow from the vertebral artery on that side).
  • Syncope that resolves quickly and can occur without warning or sequelae.


Page Updated: 07.18.2016