Pulmonary Hypertension Your doctor has referred you to the Mary Parkes Asthma Center for pulmonary hypertension. Some patients referred here are known to have pulmonary hypertension. More often, patients are referred because their doctors suspect that they may have pulmonary hypertension. Pulmonary hypertension is a 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. Tests used to evaluate patients with suspected pulmonary hypertension include chest x-ray, high-resolution CT scanning, pulmonary function tests, and echocardiogram. Right heart catheterization (angiogram) is also used to assist in the diagnosis. Making a definite diagnosis of pulmonary hypertension requires a great deal of information. Many of the tests necessary have probably already been done by your doctor. It will be most helpful if this information is sent to us before your clinic appointment. We will be contacting your doctor’s office to have this information forwarded ahead of time. We would appreciate if you would call your physician’s office one week prior to your visit to make sure that the information has been sent to our office.