The pulmonary artery is the main artery leaving the heart. When blood leaves the heart, it flows from the lower chamber (the left ventricle), through the pulmonic valve, into the pulmonary artery. In pulmonic stenosis, the pulmonic valve does not open fully. This restricts blood flow from the heart to lungs.
Right ventricular outflow tract obstruction
Left ventricular outflow tract obstruction
Quadricuspid pulmonary valve
Atrioventricular canal defect
Intraventricular conduction delay
Congenital absence of the pericardium
Atrioventricular septal defect
Tricuspid atresia pathophysiology