A 71-year-old woman is seen in the ED with syncope. Her past history is notable for type 2 diabetes, hypertension and an implanted pacemaker. She reports feeling tired today and missing breakfast. She lost consciousness while at the kitchen table but cannot recall the events that preceded the episode. ECG shows a paced rhythm at 70 bpm and no signs of ischemia. Which of the following is the best course of action?