A newborn develops a murmur and cyanosis shortly after birth. She is diagnosed with pulmonary stenosis after an echocardiogram revealed narrowing of the:
A) mitral valve.
B) pulmonary artery.
C) pulmonary valve orifice.
D) pulmonary vein.

Question

Quizplus · Accepted Answer

Pulmonary stenosis is a congenital heart defect that involves narrowing of the pulmonary valve orifice, which obstructs blood flow from the right ventricle to the pulmonary artery. This can lead to cyanosis and a murmur shortly after birth. The other choices (mitral valve, pulmonary artery, pulmonary vein) are not involved in the pathophysiology of pulmonary stenosis.

A Newborn Develops a Murmur and Cyanosis Shortly After Birth