Related Experiment Video
Updated: Jun 11, 2026

Pre-Chiasmatic, Single Injection of Autologous Blood to Induce Experimental Subarachnoid Hemorrhage in a Rat Model
Published on: June 18, 2021
Chronic brainstem ischemia in subclavian steal syndrome
Vijay K Sharma1, Benjamin Chuah, Hock L Teoh
1Division of Neurology, National University Hospital, 5 Lower Kent Ridge Road, Singapore 119074, Singapore. drvijay@singnet.com.sg
Abstract:
Subclavian steal syndrome is usually an incidental finding and rarely causes vertebrobasilar ischemia. We present a 58-year-old man who, over six months, experienced progressive slowing in both talking and walking. Cervical duplex sonography revealed severe stenosis of the right subclavian artery; fixed retrograde flow was noted in the right vertebral artery on transcranial Doppler. The hyperemia-ischemia cuff test resulted in considerable reduction in flow velocities in both posterior cerebral arteries. We attributed his slowness to chronic vertebrobasilar ischemia and surgical revascularization was performed. His symptoms subsided immediately after surgery. The improved perfusion in the posterior circulation was demonstrated on technetium-99 hexamethylpropyleneamine oxime single photon-emission CT. Early diagnosis and prompt treatment resulted in an improved quality of life.
Related Concept Videos
Ischemic Stroke ll: Pathophysiology
Ischemic Stroke l: Introduction
Transient Ischemic Attack l: Introduction
Arteries of the Head and Neck
The internal carotid arteries supply blood to the anterior portion of the cerebrum. They enter the...
Hemorrhagic Stroke ll: Pathophysiology
Acute Coronary Syndrome I: Introduction
