is often caused by kinking at the vascular pedicle and can mimic a hemodynamically significant stenosis; however, maneuvers such as scanning in expiration, or in the standing position may differentiate between the two.
Lumbar spinal stenosis and pseudostenosis
. Definition and classification of pathology.
Those without increase in gradients despite the infusion (pseudostenosis
) represent patients with marked irreversible systolic dysfunction without contractile reserve and does not benefit from surgical replacement.