The nurse is caring for a patient with adrenal insufficiency. What priority physical assessment should the nurse perform?

Choice A reason: Adrenal insufficiency can lead to electrolyte imbalances such as hyperkalemia and hypovolemia, which directly affect cardiac function. Monitoring heart rate, rhythm, and blood pressure is essential to detect life-threatening complications. Choice B reason: Neurologic changes may occur but are secondary to cardiovascular instability. They are not the first priority. Choice C reason: Respiratory assessment is important but not the primary concern unless there is evidence of respiratory compromise. Choice D reason: Skin changes such as hyperpigmentation may be present in chronic adrenal insufficiency but are not urgent or life-threatening.