Basilar artery occlusion: clinical and radiological correlation

Area of Science:

• Neurology
• Vascular Neurology
• Neurocritical Care

Background:

• Basilar artery occlusion (BAO) is a critical neurological emergency.
• Vertebral artery occlusions can also lead to posterior circulation ischemia.
• Understanding prognostic factors and collateral circulation is vital for patient outcomes.

Purpose of the Study:

• To correlate clinical data and long-term follow-up with basilar artery occlusion characteristics.
• To evaluate the impact of collateral flow on patient prognosis.
• To identify predictors of poor outcomes in basilar artery occlusion.

Main Methods:

• Retrospective study of 23 patients (20 BAO, 3 bilateral vertebral artery occlusions).
• Correlation of clinical presentation (hypertension, coma) with occlusion site/extent.
• Assessment of collateral flow patterns and their relationship to neurological function.

Main Results:

• Hypertension and coma at onset are associated with a grave prognosis in BAO.
• Surface collateral flow may not ensure perfusion of critical penetrating arteries.
• Inadequate perfusion of paramedian and thalamoperforating branches affects consciousness and respiratory control.

Conclusions:

• Prognosis in basilar artery occlusion is significantly influenced by initial clinical status.
• Relying solely on surface collateral flow can be misleading regarding brainstem and thalamic perfusion.
• Targeted assessment of penetrating artery perfusion is crucial for managing BAO patients.