A patient arrives at the emergency department complaining of midsternal chest pain. Which of the following nursing action should take priority?

The priority nursing action for a patient arriving at the ED in distress is always assessment of vital signs. This indicates the extent of physical compromise and provides a baseline by which to plan further assessment and treatment. A thorough medical history, including onset of symptoms, will be necessary and it is likely that an electrocardiogram will be performed as well, but these are not the first priority. Similarly, chest exam with auscultation may offer useful information after vital signs are assessed.