If one started positive-pressure ventilation for a newborn because her heart rate is low (bradycardia), the most important indicator of successful positive-pressure ventilation is an increased or rising heart rate. For example, the previous heart rate of the baby is 100 beats per minute (bpm), then after positive-pressure ventilation it should go higher than 100 bpm. It can also be distinguished by observing if the baby has acquired a spontaneous breathing.