This document summarizes three common obstructive congenital heart defects: pulmonary stenosis, aortic stenosis, and coarctation of the aorta. Pulmonary stenosis involves obstruction of blood flow from the right ventricle to the pulmonary artery. Aortic stenosis is a narrowing of the aortic valve that restricts outflow from the left ventricle. Coarctation of the aorta is a narrowing of the aorta near the ductus arteriosus, creating differential blood pressures between the upper and lower body. The document outlines the clinical features, physical exam findings, investigations, and management options for each of these three conditions.