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.
Put the roast directly onto the oven rack once the oven has finished heating. Place a tray beneath the roast to catch the drippings. The fat side of the roast must face upward so that the flavor of the meat drips down as the roast is cooking. Let the roast cook for 20 minutes or until browned. Lower the heat of the oven to 200 degrees (conventional ovens would use 225 degrees). Cook for an hour and a half, then check the temperature of the middle of the roast. It should be at 135 to 140 degrees.