The purpose of this study is to create a registry of patients with Pulmonary Hypertension who received medical care in the Hospital Italiano of Buenos Aires.

The Institutional Registry of Pulmonary Hypertension includes patients prospectively with incident pulmonary hypertension type I. It also includes prevalent cases from our HMO who had diagnosis prior the beginning of the registry.

• Inclusion Criteria:

  1. Diagnosed with PAH WHO group 1 (2022 ESC/ESR guidelines criteria) as the presence of a mean pulmonary artery pressure (mPAP) greater than 20 mmHg at rest with pulmonary arterial wedge pressure (PAWP) >15 mmHg and pulmonary vascular resistance (PVR) >2 WU, according to the 2022 ESC/ERS Guidelines for the diagnosis and treatment of pulmonary hypertension.
  2. Included in the institutional registry of PAH of Hospital Italiano de Buenos Aires
  3. Aged ≥18 years at the index date.

• Exclusion Criteria History of lung transplantation surgery previously the baseline period

Patients who meet inclusion criteria and none of exclusion criteria during the study period are eligible to this study. In the population, the PAH cohort will consist of those incident cases and prevalent cases PAH WHO group 1 aged ≥18 years between January 2017 and December 2030 who attended at Hospital Italiano of Buenos Aires.