<prompt> The ratio of chest compressions to ventilation in a newborn is1:012:013:014:01  <response>: If the hea rate does not improve after 30 sec with bag-and-mask or endotracheal ventilation and remains below 100 beatsmin, ventilation is continued and chest compression should be initiated over the lower third of the sternum at a rate of 90 compressionsmin. The ratio of compressions to ventilation is 3 : 1 90 compressions:30 breaths. If the hea rate remains 60 beatsmin despite effective compressions and ventilation, administration of epinephrine should be considered.Ref: Nelson; 20th edition; Page no: 845 