What Causes Peripheral Pulmonary Stenosis Murmur in Newborns?
PPS murmur in newborns is often due to physiological reasons. One common cause is the natural narrowing of the pulmonary artery branches, especially in preterm infants. This narrowing is usually a part of the normal adaptation process as the newborn's circulatory system transitions from fetal to postnatal life. Less commonly, PPS can be associated with congenital syndromes such as Williams syndrome, Alagille syndrome, or other congenital heart defects.
