Definition. Pulmonary hypertension is a rare lung disorder characterized by increased pressure in the pulmonary artery. The pulmonary artery carries oxygen-poor blood from the lower chamber on the right side of the heart (right ventricle) to the lungs where it picks up oxygen.ulmonary hypertension is present when the blood pressure in the circulation of the lungs is measured at greater than 25 mm of mercury (Hg) at rest or 30 mm Hg during exercise. Pulmonary hypertension can be either primary or secondary: 1  Primary pulmonary hypertension. 2  The cause of pulmonary hypertension is unknown.
Serve gravy with the meat and the vegetables. How to Make a Pot Roast -- Oven Directions. Preheat the oven to 325 degrees F. Prepare as directed above, except in Step 3, bake pot roast, covered, for 1 hour.Add the vegetables and potatoes as directed. Cover and bake 45 to 60 minutes more or until the meat is tender.Prepare the gravy in a saucepan as directed in Step 7.erve gravy with the meat and the vegetables. How to Make a Pot Roast -- Oven Directions. Preheat the oven to 325 degrees F. Prepare as directed above, except in Step 3, bake pot roast, covered, for 1 hour.
1 Place the roast in the oven for 20 to 25 minutes, searing the outer surface. 2  Turn the oven temperature down to 325Â° and continue to cook until done. 3  The roast should be removed from the oven when the internal temperature reaches 135Â° to 140Â° and then allowed to stand for 10 to 15 minutes before carving. Sear the roast before roasting. 2  To sear in the oven, have the oven preheated to 450Â° to 475Â°. 3  Place the roast in the oven for 20 to 25 minutes, searing the outer surface. 4  Turn the oven temperature down to 325Â° and continue to cook until done.