CPR chest compressions should begin on a neonatal patient when the heart rate remains below 60 beats per minute after at least 30 seconds of effective ventilation that visibly moves the chest. This threshold has been consistent across multiple guideline updates and was reaffirmed in the 2025 American Heart Association and American Academy of Pediatrics guidelines for neonatal life support.
The key word in that rule is “after.” Unlike adult or pediatric cardiac arrest, neonatal resuscitation follows a strict sequence. Compressions are never the first intervention for a newborn. Ventilation comes first, and compressions only enter the picture when adequate breathing support fails to bring the heart rate up.
Why Ventilation Must Come First
Most newborns who need help at birth respond to the initial steps of resuscitation or to ventilation alone. The overwhelming majority of neonatal cardiac events are respiratory in origin, meaning the heart slows down because the baby isn’t getting enough oxygen, not because of a primary heart problem. Filling the lungs with air is the single most effective intervention, and a rising heart rate is the clearest sign that ventilation is working.
Because effective ventilation is genuinely difficult to deliver to a newborn (mask leaks, airway obstruction, and insufficient pressure are all common), the guidelines emphasize a set of corrective steps before anyone considers compressions. These include repositioning the airway, adjusting the mask or switching to a two-handed mask hold, suctioning, increasing inflation pressure, and placing an alternative airway such as an endotracheal tube or laryngeal mask. The 2025 guidelines specifically state that ventilation should preferably include intubation before compressions begin, since compressions compete with the delivery of effective breaths.
The 60 BPM Threshold
If the heart rate stays below 60 beats per minute after 30 seconds of ventilation that produces visible chest rise, compressions should start. That 30-second window is not simply a timer to watch. It requires confirmation that ventilation is actually inflating the lungs. Chest movement is the observable proof. If the chest isn’t moving, the problem is ventilation quality, not a need for compressions.
Heart rate in a newborn is typically assessed by listening with a stethoscope or feeling the pulse at the base of the umbilical cord. The Neonatal Resuscitation Program recommends counting heartbeats over 6 seconds and multiplying by 10 to estimate beats per minute. In practice, this assessment takes anywhere from 7 to 19 seconds. Electronic cardiac monitoring can also be used but takes 30 to 60 seconds to set up, and pulse oximetry takes even longer (60 to 120 seconds), making manual methods faster for initial decisions.
Compression Technique and Rate
Once compressions begin, they are delivered at a rate of 90 compressions per minute, coordinated with 30 breaths per minute, for a 3:1 compression-to-ventilation ratio. In a one-minute cycle, that works out to roughly 90 compressions and 30 breaths, with three compressions followed by one breath in a steady rhythm. This ratio reflects the respiratory origin of most neonatal arrests: the baby needs a high proportion of ventilation relative to compressions.
The preferred hand position is the two-thumb technique, where both thumbs press on the lower third of the sternum while the fingers wrap around the baby’s chest for support. Compared to the two-finger method (pressing with the tips of two fingers), the two-thumb approach generates better blood flow to the heart, achieves greater compression depth, produces higher blood pressure, and causes less fatigue for the rescuer. Studies in simulated infant CPR have shown the two-thumb technique delivers better-quality compressions even with a single rescuer, without interfering with ventilation.
Oxygen During Compressions
When compressions are needed, guidelines recommend increasing the oxygen concentration to 100%. During chest compressions, blood flow to the lungs, brain, and heart is extremely low, so maximizing the oxygen content of each breath is considered a reasonable approach even though the evidence is limited. This recommendation, endorsed by the International Liaison Committee on Resuscitation, is based largely on expert opinion and animal studies. For cardiac arrest specifically, coronary and cerebral oxygen levels drop so low that using 100% oxygen appears prudent. For bradycardia (a slow heart rate without full cardiac arrest), the optimal oxygen level is less clear, with animal data showing no significant difference between room air and 100% oxygen.
When the Standard Ratio Changes
The 3:1 compression-to-ventilation ratio applies to newborns immediately after birth, when the lungs have had minimal or no air in them and the priority is getting them inflated. Later in the neonatal period, if the cause of cardiac arrest is suspected to be cardiac in origin rather than respiratory (for example, a known heart defect), a 15:2 ratio may be more appropriate. This higher compression ratio mirrors pediatric and adult protocols where maintaining circulation takes priority over ventilation, since the lungs are already aerated.
Reassessing During CPR
After compressions begin, the team periodically pauses to reassess the heart rate. If the heart rate rises above 60 beats per minute, compressions can stop while ventilation continues. If it remains below 60 despite good compressions and ventilation, the next step in the algorithm involves medication. The goal at every reassessment is the same: confirm that interventions are producing visible chest movement and check whether the heart rate has responded.