Reversible Cerebral Vasoconstriction Syndrome.

Background: Reversible cerebral vasoconstriction syndrome (RCVS) is an underappreciated and poorly understood cause of thunderclap headache (TCH). Although self-limited in the majority of patients, incidence is increasing, with presentations overlapping considerably with life-threatening conditions, such as aneurysmal subarachnoid hemorrhage and stroke. In addition, radiographic findings seen in RCVS are also present in primary angiitis of the central nervous system (PACNS).

Prospective, randomized evaluation of a personal digital assistant-based research tool in the emergency department.

Background: Personal digital assistants (PDA) offer putative advantages over paper for collecting research data. However, there are no data prospectively comparing PDA and paper in the emergency department. The aim of this study was to prospectively compare the performance of PDA and paper enrollment instruments with respect to time required and errors generated.