Baby boy Ellis, 2 hours old, is being evaluated in the newborn nursery by the nursing staff. Findings include temperature 37°C; apical heart rate 140 bpm; respirations 58 breaths per minute; BP (arms) 70/47, (calves) 62/39; head circumference 34 cm; chest circumference 31 cm; length 48 cm; weight 2,700 g.
The infant is crying. Based on the physical findings, the newborn is diagnosed with aortic stenosis. What is the pathophysiology of this disorder? What assessments/tests should you expect to be done on this infant? What should you include in the teaching plan for the parents of this infant?