system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A patient presents to the emergency department of AIIMS with the most severe headache of his life. What should be done next?
assistant
The correct answer is  ANS. B* Investigation of choice in subarachnoid hemorrhage (SAH): Noncontrast CT* Investigation of choice in aneurysm: DSA* Investigation which can diagnose ischemia in brain earliest: MRI (diffusion weighted imaging, within 3-30 minutes)* First imaging investigation to be done in a patient with suspected stroke: Noncontrast CT.