Role of echocardiography in emergencies.
D001021:Aortic Valve / Q000002:abnormalities; D002305:Cardiac Tamponade / Q000175:diagnosis*; D004452:Echocardiography / Q000379:methods*; D004632:Emergency Medical Services; D006801:Humans; D008944:Mitral Valve Insufficiency / Q000175:diagnosis*