What is the normal heart rate for infants younger than 1 year old?

The normal heart rate for infants younger than 1 year old typically ranges from 110 to 160 beats per minute (bpm). This elevated heart rate is a normal physiological response in infants, as their smaller bodies require a faster heart rate to adequately circulate blood to support their rapid growth and metabolic demands.

When considering the other ranges provided, they fall outside the normal parameters for infants. For example, a range of 70-100 bpm is more reflective of adult heart rates, while 90-130 bpm may be applicable to older children. The range of 120-170 bpm exceeds the normal upper limit for infants. Understanding these normal ranges is essential for assessing cardiac health and ensuring appropriate responses to abnormal findings in pediatric patients.