Abstract
Surgical treatment was performed on three patients of dissecting aneurysm of the vertebral artery (VADA) presenting with ischemic or compressive signs, in whom aneurysmal dilatation had been confirmed on repeated angiograms. A balloon occlusion test confirmed that proximal vertebral artery (VA) clipping was possible without producing neurological deficits. The VA was permanently clipped at the proximal portion of the aneurysm in the chronic stage (5 months after stroke) . Case 1 was a 65-year-old male of right VADA presenting with cerebellar infarction. Case 2 was a 46-year-old female of right VADA presenting with lateral medullary syndrome. She had postoperatively developed cerebellar infarction. Case 3 was a 57-year-old male of left giant VADA presenting with cerebellar signs. The long-term outcome of these three patients after surgery was good. Postoperative anticoagulant therapy was an effective way to prevent thromboembolic ischemia.
