Longitudinal, multi-center, and non-interventional registry. Patients will be identified as eligible for pulmonary artery pressure sensor implant by a heart failure cardiologist from the heart failure clinic. They will consent for device implant and procedure (right heart catheterization) per standard of care. Patients may also consent to the registry participation, which is optional. They will be informed that the registry intends to gather data and that they may be approached in the future for additional research based on their data and clinical situation. Additionally, patients who underwent pulmonary artery pressure sensor implantation from January 1, 2019, will be identified and consent will be obtained for registry participation, which is optional.