#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.
In pulmonary hypertension, the blood vessels of the lungs have an increased amount of muscle in the walls. This causes a higher resistance in the lungs. The right ventricle then has to work harder to pump blood out to the lungs. The right ventricle will enlarge and thicken in response to this extra work.