Final answer:
The single most important aspect of CPR for a newborn is to ensure they have an adequate heart rate and respiration based on the Apgar score, which assesses these vital signs immediately after birth.
Step-by-step explanation:
The single most important thing with CPR of a newborn is to ensure that the infant has an adequate heart rate and respiration. The Apgar score, which assesses heart rate, respiration, and other vital signs, is critical in determining the state of the newborn’s health immediately after birth. Newborns with an Apgar score below 7 after 5 minutes may need medical assistance, and a score below 5 is considered an emergency. Administering CPR on a newborn often requires specialized training, as the procedure differs slightly from adult CPR, particularly in the depth and frequency of compressions.