A group of nurses is reviewing the cardiovascular system and its function. Which statement by one of the nurses demonstrates an understanding of a child’s cardiovascular system?

Choice A reason: At birth, the infant’s right and left ventricles are nearly equal in size due to fetal circulation demands. This aligns with pediatric cardiology, making it the correct statement demonstrating understanding of the newborn’s cardiovascular system as discussed in the nurses’ review session. Choice B reason: The heart matures earlier, with adult-like function by early childhood, not 8-10 years. Equal ventricle size at birth is accurate, making this incorrect, as it overestimates the timeline for cardiovascular maturation in the nurse’s understanding of the child’s heart development. Choice C reason: Heart rate typically increases with fever in children, not decreases, due to metabolic demands. Equal ventricle size at birth is correct, making this inaccurate and incorrect compared to the true statement about the infant’s cardiovascular system in the nurses’ review. Choice D reason: The left ventricle grows slightly larger but not twice the right’s size by 5-6 years. Equal ventricles at birth is accurate, making this incorrect, as it exaggerates ventricular growth in the nurse’s understanding of the child’s cardiovascular system development.