Review Question - QID 109498

An 11-month-old boy presents to the emergency department with his father after “passing out” at home. His father reports that the patient started crying after his older brother took a toy away from him. The patient was difficult to soothe and then suddenly stopped breathing. His father reports that his lips turned slightly blue and the patient’s entire body became limp. The episode lasted a few seconds and the patient seemed to act normally afterwards. The patient’s father notes that the patient’s older brother had similar episodes as a child. He denies any family history of neurological disease. The patient’s temperature is 98.5°F (36.9°C), blood pressure is 86/64 mmHg, pulse is 98/min, and respirations are 26/min. On physical exam, the patient is in no acute distress playing on his father’s lap. The patient's neurological exam is unremarkable. Which of the following is the most appropriate next step in management?