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. Author manuscript; available in PMC: 2014 Sep 1.
Published in final edited form as: Circ Heart Fail. 2013 Jun 27;6(5):906–912. doi: 10.1161/CIRCHEARTFAILURE.112.000091

Figure 1. Methods for identifying the study population.

Figure 1

Results from transthoracic echocardiograms performed for any clinical indication at two Veterans Affairs (VA) medical centers were reviewed for the presence of pulmonary hypertension (PH), defined here as an estimated PASP ≥40 mmHg (calculated by the sum of the trantricuspid valve gradient plus estimated right atrial pressure). Patients likely to meet conventional criteria for severe PH were then selected for further analysis based on the presence of an estimated PASP ≥60 mmHg. PVAMC, Providence Veterans Affairs Medical Center; VABHS, Veterans Affairs Boston Healthcare System.