What is the primary purpose of CT Angiography (CTA) in acute stroke?

What is the primary purpose of CT Angiography (CTA) in acute stroke?

• A. To detect intracranial vessel occlusions and assess collateral status, guiding thrombectomy decisions.
• B. To measure intracranial pressure directly.
• C. To assess myocardial perfusion.
• D. To guide antibiotic therapy in stroke.

Answer: (A)

CT Angiography visualizes the brain’s blood vessels with contrast to show where blockages are and how well collateral vessels are supplying the area. This information is crucial for deciding if a patient with acute stroke is a candidate for mechanical thrombectomy, where the blockage is located, and how robust the alternative blood flow is, all of which influence treatment strategy and outcomes. CTA isn’t used to measure intracranial pressure, which requires invasive monitoring; it doesn’t assess heart muscle perfusion, and it isn’t used to guide antibiotic therapy in stroke.

CT Angiography visualizes the brain’s blood vessels with contrast to show where blockages are and how well collateral vessels are supplying the area. This information is crucial for deciding if a patient with acute stroke is a candidate for mechanical thrombectomy, where the blockage is located, and how robust the alternative blood flow is, all of which influence treatment strategy and outcomes.

CTA isn’t used to measure intracranial pressure, which requires invasive monitoring; it doesn’t assess heart muscle perfusion, and it isn’t used to guide antibiotic therapy in stroke.