Low Risk infants can be safely discharged but there should be shared decision making with parents.
Also offer the family CPR training resources
Consider pertussis swab, ECG, and<unk>  monitored observation in the ED.
No other consults, metabolic or hematologic labs or medications are necessary for discharge
Brief resolved unexplained event
The differential diagnosis is extensive, and although a broad workup is often started in the ED including evaluation for sepsis, occult infection, and metabolic disorders, a cause is infrequently found[2]
Deterioration after intubation
Idiopathic 
Headache during pregnancy
GERD
Acute chest pain
Seizure