Pulmonary Artery DenerVation Clinical Study Using the Gradient Denervation System in Heart Failure Patients With Pulmonary Hypertension Group 2 (PreVail-PH2 Study)

Inclusion Criteria: * Heart Failure with EF ≥ 40% (by TTE within last 3 months) * Mean Pulmonary Artery Pressure (mPAP) \>20 mmHg at rest * Pulmonary Vascular Resistance (PVR) ≥ 3WU at rest * Pulmonary Capillary Wedge Pressure \> 15 mmHg (at rest) or \> 18 with passive leg raise * Cardiac index (CI) ≥ 1.7 L/min/m2 * NYHA Class II or III * Glomerular Filtration Rate (GFR) ≥ 25 ml/min * Stable, guideline directed medical treatment, including controlled volume status for a minimum of 1 months prior treatment Exclusion Criteria: * Ambulatory with a Life expectancy of \< 1 years * Inability to take dual antiplatelet or anticoagulants, hypersensitivity or allergy to aspirin or clopidogrel * Unable to tolerate right heart catheterization * Pulmonary artery aneurysm, moderate or greater PA stenosis or other PA anatomy that would prevent safe or proper use of the study device * Severe aortic, mitral or pulmonary valve regurgitation * Tricuspid regurgitation in conjunction with the presence of cirrhosis or congestive hepatopathy * Clot or Thrombus in any potential target ablation zone (right, left or main pulmonary artery)