Intracranial bypass grafts for vertebral-basilar ischemia

Area of Science:

• Neurosurgery
• Vascular Surgery
• Neurology

Background:

• Vertebral artery occlusive disease poses a risk for posterior circulation infarcts.
• Surgical revascularization is considered for selected patients with vertebral-basilar system ischemia.
• Anastomosis of the occipital branch of the external carotid artery to the posterior inferior cerebellar artery is a potential treatment strategy.

Observation:

• Fourteen patients underwent external carotid artery to posterior inferior cerebellar artery bypass for vertebral artery lesions.
• Postoperative angiography confirmed graft patency in 13 out of 14 procedures.
• In 9 cases, the bypass was the primary blood supply to the vertebral-basilar system.

Findings:

• Eight patients at high risk for stroke showed significant recovery, with five returning to full employment or normal retired life.
• Six patients with pre-existing neurological deficits demonstrated functional improvement, with two resuming normal activities.
• The procedure was effective in revascularizing the posterior circulation.

Implications:

• This surgical approach may be beneficial for carefully selected patients with vertebral-basilar ischemia.
• The technique could also be applicable in managing specific aneurysms within the vertebral-basilar system.
• Further research is warranted to establish the long-term efficacy and safety of this intervention.