recruited in the Emergency Room. Mean duration of headache was 61 hours. CT scan
disclosed subarachnoid bleeding in 4 patients and spinal tap revealed subarachnoid
hemorrhage (SAH) in 5 patients with normal CT scan. In most SAH cases pain was bilateral,
very intense and involving the occipital region. Four of these patients had doubtful or no
nuchal rigidity and in one, pain improved while in the Emergency Room. In every case with …