Bypass Revascularization Applied to the Posterior Cerebral Artery

Area of Science:

• Neurosurgery
• Vascular Surgery
• Neurology

Background:

• Bypass procedures on the posterior cerebral artery (PCA) are valuable for complex posterior circulation aneurysms.
• The PCA's anatomical course necessitates diverse surgical approaches for effective access.

Purpose of the Study:

• To analyze a retrospective case series of PCA bypass procedures.
• To investigate treatment strategies and outcomes for PCA aneurysms.

Main Methods:

• Retrospective analysis of seven patients undergoing PCA bypass.
• Assessment of aneurysm location, surgical approaches, anastomosis site, bypass patency, and modified Rankin Scale scores.
• Evaluation of transient and permanent morbidity.

Main Results:

• Patients had aneurysms on PCA segments P2/P3, vertebral artery, or carotid-posterior communicating artery.
• Multiple surgical approaches were utilized, including temporal and interhemispheric routes.
• All bypasses remained patent; permanent morbidity included cognitive dysfunction and hemiparesis in two patients.

Conclusions:

• PCA bypass revascularization is an effective treatment for complex posterior circulation vascular lesions.
• Tailored surgical approaches are crucial for accessing various PCA segments.
• Combined surgical approaches facilitate access to both proximal and distal aspects of the PCA relative to the lesion.