What is the normal heart rate range for infants?

The normal heart rate range for infants typically falls between 100 to 160 beats per minute. This elevated rate compared to adults reflects the higher metabolic rate and physiological demands of infants, who are still in their rapid growth phase. An infant's heart rate may vary throughout the day, particularly during activity, sleep, and feeding, but the general range is well established between these values.

Other ranges provided do not accurately represent the normal physiological state for infants. For example, the lower ranges would be reflective of adult heart rates rather than infants, who require a higher heart rate to support their developing bodies. Thus, the heart rate given in the correct answer is appropriate for the age group, promoting understanding of normal pediatric cardiovascular health.