Abstract
Pulmonary hypertension (PH) is a pathophysiological disorder defined by a mean pulmonary artery pressure ≥25mm Hg at rest, measured during right heart catheterization. PH may be due to arterial hypertension, left heart disease, secondary to lung disease and/or hypoxia, chronic thromboembolic diseases, unclear/multifactorial mechanism. Transthoracic Doppler echocardiography (TTE) is the main tool on the detection and the screening of PH. If estimated probability for PH is low, echocardiographic follow-up is recommended, and other possible causes may be studied. When echocardiographic findings are consistent with moderate or high probability for PH, accurate identification of clinical groups is needed, and complementary tests will be used to discharge, among others, underlying respiratory diseases (PH Group 3)
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