What is the initial imaging test typically performed in suspected acute ischemic stroke to exclude hemorrhage?

What is the initial imaging test typically performed in suspected acute ischemic stroke to exclude hemorrhage?

• A. Non-contrast head CT
• B. Contrast-enhanced CT
• C. MRI with diffusion weighting
• D. Carotid Doppler ultrasound

Answer: (A)

In suspected acute ischemic stroke, the first imaging step is a non-contrast head CT to rapidly exclude intracranial hemorrhage. This test is fast, widely available in emergency settings, and can identify acute bleeding as a hyperdense area, which is crucial because the presence of hemorrhage changes the treatment plan and generally rules out thrombolysis. If no hemorrhage is found, clinicians can proceed with decision-making about reperfusion therapy for ischemia. While MRI with diffusion weighting is more sensitive for detecting early ischemia, it is not typically the initial test due to longer scan times and accessibility issues. Contrast-enhanced CT can help evaluate vessels or other pathology but is not the best initial method for ruling out hemorrhage because the contrast adds time and can complicate interpretation. So, non-contrast head CT serves as the quickest, most reliable first screen to rule out hemorrhage and guide urgent treatment.

In suspected acute ischemic stroke, the first imaging step is a non-contrast head CT to rapidly exclude intracranial hemorrhage. This test is fast, widely available in emergency settings, and can identify acute bleeding as a hyperdense area, which is crucial because the presence of hemorrhage changes the treatment plan and generally rules out thrombolysis. If no hemorrhage is found, clinicians can proceed with decision-making about reperfusion therapy for ischemia. While MRI with diffusion weighting is more sensitive for detecting early ischemia, it is not typically the initial test due to longer scan times and accessibility issues. Contrast-enhanced CT can help evaluate vessels or other pathology but is not the best initial method for ruling out hemorrhage because the contrast adds time and can complicate interpretation. So, non-contrast head CT serves as the quickest, most reliable first screen to rule out hemorrhage and guide urgent treatment.