As I'm interested in stroke, especially subarachnoid hemorrhage (SAH), I've read 3 articles in the new England journal of medicine; this topic is, unfortunately, full of pitfalls and many patients attending the ERs are being misdiagnosed as having migraine or tension-type headache. I would suggest reading these wonderful articles:
1- Aneurysmal subarachnoid hemorrhage (Current Concept).
2- Avoiding Pitfalls in the Diagnosis of Subarachnoid Hemorrhage (Primary Care).
3- Intracranial Aneurysms (Review Article).
Best wishes...
Dr. O Amin MRCPI