This report describes a novel sonographic protocol for the evaluation of the undifferentiated hypotensive patient, This protocol combines components of 3 sonographic applications: free fluid, cardiac, and abdominal aorta into a single protocol. We believe this protocol and its underlying principles should be a routine part of the empiric evaluation of the patient with undifferentiated hypotension or pulseless electrical activity. (Am J Emerg Med 2001;19:299-302 Copyright (C) 2001 by W.B. Saunders Company).