#3. I spray painted the ceiling (floor joists and subfloor) of the unfinished basement of our 1925 house about six months ago. I used white Zinnnser 123 primer and did not even bother to put anything over it. The point was to lighten it and brighten it up and it worked very well for that.
Pulmonary atresia. Pulmonary atresia is a congenital malformation of the pulmonary valve in which the valve orifice fails to develop. The valve is completely closed thereby obstructing the outflow of blood from the heart to the lungs. The pulmonary valve is located on the right side of the heart between the right ventricle and pulmonary artery.
Pulmonary atresia with a ventricular septal defect: In this form of pulmonary atresia, a ventricular septal defect (VSD) allows blood to flow into and out of the right ventricle (RV). Therefore, blood flowing into the RV can help the ventricle develop during pregnancy, so it is typically not as small as in pulmonary atresia with an intact ventricular septum.