Utility of Device and App-based Mobile Health Monitoring as a Tool for Evaluation of Clinical Response to Therapies in Pulmonary Arterial Hypertension

Inclusion Criteria

Inclusion Criteria: * Diagnosis of WHO Group I Pulmonary Arterial Hypertension (PAH) (Idiopathic (I)PAH, Heritable PAH (including Hereditary Hemorrhagic Telangiectasia), Associated (A)PAH (including collagen vascular disorders, drugs+toxins exposure, congenital heart disease, and portopulmonary disease). * Do not meet exclusion criteria Exclusion Criteria: * Pulmonary Hypertension due to left heart disease (PH-LHD, WHO group 2), Pulmonary hypertension due to chronic lung disease (PH-CLD, WHO group 3), Chronic thrombo-embolic pulmonary hypertension (CTEPH, WHO group 4), pulmonary hypertension with unclear and/or multi-factorial mechanisms (WHO goup 5) * Inability to perform a 6 minute walk test (6MWT)