This is an observational prospective study to better understand the clinical impact of Pulmonary Arterial Hypertension (PAH) specific therapy in patients with atypical PAH among those with risk factors for left heart disease~The study involves detailed baseline clinical evaluation prior to initiation of PAH therapy, followed by repeat clinical assessment after 6 months of medical therapy
The purpose of this study is to characterize the clinical and hemodynamic response of Pulmonary Arterial Hypertension (PAH) therapy in patients with atypical PAH and risk factors for left heart disease.