Which vital sign change would prompt immediate intervention during newborn resuscitation?

In the context of newborn resuscitation, a heart rate below 100 beats per minute is a critical indicator that requires immediate intervention. The normal heart rate for a newborn should be greater than 100 beats per minute; if it falls below this threshold, it can signify inadequate cardiac function and the potential for compromised blood flow to vital organs. A heart rate below 100 beats per minute may indicate bradycardia, which is a concerning sign during resuscitation efforts.

Timely responses, such as airway management, deliverance of positive pressure ventilation, and chest compressions if necessary, are essential to restore normal circulation and ensure the newborn's well-being. This makes it a top priority during resuscitation, as prolonged bradycardia can lead to severe morbidity or mortality.

The other choices, while important to monitor, do not indicate the immediate life-threatening situation that a heart rate below 100/min suggests during resuscitation. For example, a respiratory rate above 60/min is often seen as normal in newborns, temperature below 36.0 C, although important for thermoregulation, is a concern that can be addressed slightly later in the resuscitation process. Oxygen saturation above 95% is generally acceptable and typically