Nursing care
Newborn heart rate below 100 at birth: warm, dry, stimulate, then ventilate
Written and reviewed by Dana Whitfield, RN, MSN · 4 min read · Updated October 2026
Short answer
A newborn who is not breathing well and has a heart rate below 100 needs effective positive pressure ventilation after the initial steps of warming, drying, stimulating and opening the airway. Ventilation is the key intervention because most newborn bradycardia comes from inadequate breathing. Chest compressions start only if the heart rate stays below 60 despite effective ventilation.
Why breathing, not the heart, is usually the problem
Before birth, the placenta handles gas exchange. At birth, the lungs must fill with air and take over. When a newborn does not breathe effectively, oxygen falls and the heart slows in response. In most newborns, a low heart rate is therefore a sign of a breathing problem rather than primary heart disease, which is why resuscitation focuses on the lungs first.
The heart rate is the main guide to whether interventions are working. Effective ventilation usually produces a rapid rise in heart rate, and that improvement is how the team judges success. This logic explains the priority order on exam questions: compressions and medications cannot help much if the lungs are not being inflated.
Initial steps in the first minute
Every newborn needs a rapid assessment of tone, breathing and heart rate. Warmth comes first: dry the baby thoroughly, remove wet linen and place them under a radiant warmer or skin to skin, because cold stress increases oxygen demand. Drying and gently rubbing the back also provide stimulation to breathe. Position the head in a neutral sniffing position to open the airway.
Suction is used only if secretions are obstructing the airway, not routinely. If the baby is apneic, gasping or the heart rate is below 100 after these steps, positive pressure ventilation should start promptly. WHO guidance stresses that ventilation with a bag and mask is the critical step for a baby who is not breathing after drying and stimulation.
Making ventilation effective
Use a correctly sized mask that covers the mouth and nose without pressing on the eyes, and watch for chest rise with each breath. If the chest does not rise and the heart rate does not improve, the team corrects the mask seal, repositions the head, clears the airway, opens the mouth and increases pressure as guided by local resuscitation training.
Attach a pulse oximeter to the right hand or wrist to track heart rate and oxygen saturation, and listen to the chest or use a monitor for heart rate. Call for additional skilled help as soon as ventilation is needed. One person ventilates while another assesses heart rate and records times, so that decisions follow the protocol rather than guesswork.
Why compressions and drugs are not first
Chest compressions are indicated when the heart rate remains below 60 despite adequate ventilation, not simply because it is below 100. Starting compressions while the lungs are not inflated wastes the most effective intervention and reduces the quality of ventilation. When compressions are needed, they are coordinated with breaths rather than replacing them.
Epinephrine is considered only if severe bradycardia persists after compressions and effective ventilation, and it requires vascular access such as an umbilical venous line. Volume expansion has a role mainly when blood loss is suspected. On exam questions, any option that jumps to drugs, compressions or an intravenous line before ventilation is a distractor.
Worked example and what can wait
In a hypothetical scenario, a term baby is limp and apneic after drying and stimulation, and the heart rate is about 80. The options are to start chest compressions, begin positive pressure ventilation, give epinephrine through an umbilical line, or obtain an Apgar score before acting. Beginning ventilation is correct, since breathing failure is driving the low heart rate.
Compressions would be premature at 80 with no ventilation given, epinephrine comes much later, and Apgar scoring describes the baby's condition but never delays resuscitation. Weighing, vitamin K, eye prophylaxis and identification bands can all wait until the baby is stable. In practice, teams follow their neonatal resuscitation algorithm and training.
Sources and further reading
MSD Manual Professional: Neonatal Resuscitation. Initial steps, thresholds for ventilation and compressions, heart rate as the guide, epinephrine after compressions.
WHO: Newborn health, perinatal asphyxia. Drying, stimulating and warming, and bag-and-mask ventilation as the critical step.
The next step on this is the same as on everything else here: answer questions and read the rationales. Our maternity and newborn practice questions are the closest set to what this page covers.
Common questions
Should every newborn be suctioned at birth?
No. Suction is reserved for secretions that obstruct the airway. Routine suctioning can delay breathing support and may stimulate a vagal slowing of the heart rate.
At what heart rate are chest compressions started in a newborn?
Compressions begin when the heart rate stays below 60 per minute despite effective ventilation. A rate between 60 and 100 calls for ventilation, not compressions.
How does the team know ventilation is working?
The main sign is a rising heart rate, along with visible chest movement and improving oxygen saturation on the right-hand pulse oximeter.