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  • Title: The current treatment of pulmonary arterial hypertension: time to redefine success.
    Author: Rich S.
    Journal: Chest; 2006 Oct; 130(4):1198-202. PubMed ID: 17035456.
    Abstract:
    In the past decade, three classes of medications have been approved for the treatment of pulmonary arterial hypertension. A review of the clinical trial data for the prostanoids, endothelin antagonists, and phosphodiesterase-5 inhibitors has shown that all agents have similar efficacy on the 6-min walk distance over 12 to 16 weeks, which was the primary end point in the randomized clinical trials. However, little is known about their long-term efficacy or about how these drugs affect the underlying disease, if at all. Successful therapy is currently defined as an improvement in exercise tolerance over a 4-month period. Future trials need to better characterize how therapies affect the pulmonary vasculature pathologically, biologically, and hemodynamically, and whether survival is actually improved.
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