Pulmonary stenosis

In pulmonary stenosis, the flow of blood from the right ventricle to the pulmonary artery is obstructed by narrowing at the pulmonary valve. The greater the constriction, the harder the right ventricle must pump to force blood into the pulmonary artery. Pumping of the right ventricle against increased pressure causes the right ventricle to become thicker (hypertrophied).

See more Multimedia