Final answer:
A heart rate less than or equal to 60 bpm in infants and children with signs of poor perfusion is indicative of bradycardia or cardiac distress, prompting immediate medical evaluation and treatment, not overhydration.
Step-by-step explanation:
In infants and children, a heart rate (HR) less than or equal to 60 bpm with signs of poor perfusion is not treated as a sign of overhydration but rather as a medical concern that could indicate serious underlying conditions, such as bradycardia or cardiac distress. Signs of poor perfusion can include pale or blue skin, cool extremities, weak pulses, and lethargy.
In such cases, medical professionals would look for causes such as congenital heart defects, metabolic disorders, or shock. It is important to immediately evaluate and treat the underlying cause, which may require interventions like providing supplemental oxygen, intravenous fluids, and potentially a pacemaker if bradycardia is due to intrinsic heart conditions like SA or AV node abnormalities.