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    Pulmonary Hypertension

    Pulmonary arterial hypertension; Sporadic primary pulmonary hypertension; Familial primary pulmonary hypertension; Idiopathic pulmonary arterial hypertension; Primary pulmonary hypertension; PPH; Secondary pulmonary hypertension

    Pulmonary hypertension is abnormally high blood pressure in the arteries of the lungs. It makes the right side of the heart work harder than normal.

    The right side of the heart pumps blood through the lungs, where it picks up oxygen. Blood returns to the left side of the heart, where it is pumped to therest of thebody.

    When the small arteries (blood vessels) of the lung become narrowed, they cannot carry as much blood. When this happens, pressure builds up. This is called pulmonary hypertension.

    The heart needs to work harder to force the blood through the vessels against this pressure. Over time, this causes the right side of the heart to become larger.

    At this point, heart failureaffects the right side of the heart. This is called cor pulmonale.

    Pulmonary hypertension may be caused by:

    • Autoimmune diseases that damage the lungs, such as scleroderma and rheumatoid arthritis
    • Birth defects of the heart
    • Blood clots in the lung (pulmonary embolism)
    • Heart failure
    • Heart valve disease
    • HIV infection
    • Low oxygen levels in the blood for a long time (chronic)
    • Lung disease, such as COPD or pulmonary fibrosis
    • Medicines (for example, certain diet drugs)
    • Obstructive sleep apnea

    In many patients, the cause of pulmonary hypertension is unknown. In this case, the condition is called idiopathic pulmonary arterial hypertension (IPAH). Idiopathic means the cause of a disease is not known. IPAH is rare. It affects more women than men.

    If pulmonary hypertension is caused by a known medicine or medical condition, it is called secondary pulmonary hypertension.

    Symptoms

    Shortness of breath or light-headedness during activity is often the first symptom. Fast heart rate (palpitations) may be present. Over time, symptoms occur with lighter activity or even while at rest.

    Other symptoms include:

    • Ankle and leg swelling
    • Bluish color of the lips or skin (cyanosis)
    • Chest pain or pressure, usually in the front of the chest
    • Dizziness or fainting spells
    • Fatigue
    • Increased abdomen size
    • Weakness

    People with pulmonary hypertension often have symptoms that come and go. They report good days and bad days.

    Exams and Tests

    A physical examination may show:

    • Abnormal heart sounds
    • Feeling of a pulse over the breastbone
    • Heart murmur on the right side of the heart
    • Larger-than-normal veins in the neck
    • Leg swelling
    • Liver and spleen swelling
    • Normal breathing sounds

    In the early stages of the disease, the exam may be normal or almost normal. The condition may take several months to diagnose. Asthma and other diseases may cause similar symptoms and must be ruled out.

    Tests may include:

    • Blood tests
    • Cardiac catheterization
    • Chest x-ray
    • CT scan of the chest
    • Echocardiogram
    • ECG
    • Lung function tests
    • Nuclear lung scan
    • Pulmonary arteriogram
    • Six-minute walk test
    • Sleep study

    Treatment

    There is no cure for pulmonary hypertension. The goal of treatment is to control symptoms and prevent more lung damage. It is important to treat medical disorders that cause pulmonary hypertension, such as obstructive sleep apnea, lung conditions, and heart valve problems.

    Many treatment options for pulmonary arterial hypertension are available. If you are prescribed medicines, they may be taken by mouth (oral), received through the vein (intravenous, or IV), or breathed in (inhaled).

    Your doctor will decide which medicine is best for you.You will be closely monitored during treatment to watch for side effects and to see how well you are responding tothe medicine.Do not stop taking your medicines without talking to your doctor.

    Other treatments may include:

    • Blood thinners to reduce the risk of blood clots, especially if you have IPAH
    • Oxygen therapy at home
    • Heart-lung transplant, if medicines do not work

    Other important tips to follow:

    • Avoid pregnancy
    • Avoid heavy physical activities and lifting
    • Avoid traveling to high altitudes
    • Get a yearly flu vaccine, as well as other vaccines such as the pneumonia vaccine
    • Stop smoking

    Outlook (Prognosis)

    How well you do depends on what caused the condition.

    As the illness gets worse, you will need to make changes in your home to help you get around the house.

    When to Contact a Medical Professional

    Call your health care provider if:

    • You begin to develop shortness of breath when you are active
    • Shortness of breath gets worse
    • You develop chest pain
    • You develop other symptoms

    Most patients with pulmonary arterial hypertension are treated at centers that specialize in the care of this condition.

    References

    Channick RN, Rubin LJ. Pulmonary hypertension. In: Mason RJ, Broaddus VC, Martin TR, et al., eds. Murray and Nadel's Textbook of Respiratory Medicine. 5th ed. Philadelphia, Pa.: Elsevier Saunders; 2010:chap 52.

    McLaughlin VV, Archer SL, Badesch DB, Barst RJ, Farber HW, Lindner JR, et al: American College of Cardiology Foundation Task Force on Expert Consensus Documents; American Heart Association; American College of Chest Physicians; American Thoracic Society, Inc; Pulmonary Hypertension Association. ACCF/AHA 2009 expert consensus document on pulmonary hypertension: a report of the American College of Cardiology Foundation Task Force on Expert Consensus Documents and the American Heart Association developed in collaboration with the American College of Chest Physicians: American Thoracic Society, Inc; and the Pulmonary Hypertension Association. J Am Coll Cardiol. 2009;53:1573-1619.

    Rich S. Pulmonary hypertension. In: Bonow ROL, Mann DL, Zipes DP, Libby P, eds. Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine. 9th ed. Philadelphia, Pa.: Elsevier Saunders; 2011:chap 78.

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          Review Date: 5/30/2013

          Reviewed By: Denis Hadjiliadis, MD, Assistant Professor of Medicine, Division of Pulmonary, Allergy and Critical Care, University of Pennsylvania, Philadelphia, PA. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, Bethanne Black, Stephanie Slon, and Nissi Wang.

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