An infant is being examined by a paediatric team of health professionals for the presence of a congenital heart defect. The physician on the team suspects a patent (open) ductus arteriosus, leaving the infant with very little energy. In listening to the heart, there is a noticeable heart murmur due to turbulent blood flow and the infant exhibits more rapid breathing patterns. Otherwise, the infant is doing fine and thriving.
Describe why you believe the infant in this scenario is exhibiting a heart murmur. Consider that fluids will always want to move from an area of higher pressure to an area of lower pressure (across a pressure gradient!) and provide a description of the movement of blood in this scenario.