a painless study of an infant's heart and respiratory patterns done over a continuous 12-hour period to detect any abnormal breathing patterns.

Monitoring of an infant over a period of 12 to 24 hours to determine the presence or absence of apnea or bradycardia. May be done prior to being discharged home in infants with a history of apnea, reflux, or seizures. A more sophisticated version of a pneumogram ( thermistor, pH probe) may be used to diagnose the presence of reflux.