PET/MRI in PAH Patients

Pulmonary Arterial Hypertension

Pfizer – Pulmonary Arterial Hypertension (PAH) Pfizer – Pulmonary Arterial Hypertension Bayer – Pulmonary arterial hypertension

StratosPHere (Non-interventional Study) Extension Study of Efficacy and Safety of LTP001 in Pulmonary Arterial Hypertension Participants Comparison of Different Cardiac Output Measurement Methods in Patients Undergoing Right Heart Catheterization Correlation of Right Atrial Strain With Pulmonary Hypertension, Right Ventricular Function And Outcome In Pediatric Patients A Multiple Dose Study to Investigate Safety, Tolerability and Pharmacokinetics of MN-08 Tablets Quantifying 18kDa TSPO Expression in the Lung in Pulmonary Artery Hypertension (PAH) Telerehabilitation Program Via Videoconference PAH – Randomized Clinical Trial Satralizumab in the Treatment of Pulmonary Arterial Hypertension (SATISFY-JP Trial) REgistry of Pulmonary Arterial Hypertension Associated With CONNECTIVE Tissue Diseases (RECONNECTIVE) A Study to Assess the Safety, Tolerability, and Effectiveness of the Long-Term Use of Treprostinil Palmitil Inhalation Powder (TPIP) in Participants With Pulmonary Arterial Hypertension (PAH) Pulmonary Hypertension Registry Switzerland Non-invasive Pulmonary Artery Prediction (ADOPTS) Non-invasive Pulmonary Artery Prediction Non-Invasive Measurement of Cardiac Output and Stroke Volume in PAH/CTEPH Assessment of Right Ventricular Function by Cardiac MRI in Patients With Pulmonary Arterial Hypertension (IRMA) RWD Patients With Pulmonary Arterial Hypertension Treated With IP Prostacyclin Receptor Agonists Study to Evaluate Sotatercept (MK-7962) in Children With Pulmonary Arterial Hypertension (PAH) (MK-7962-008) Consistency of Electrical Cardiometry and Pulmonary Artery Catheter Risk and Resilience in Pulmonary Arterial Hypertension and Genetically Susceptible Individuals Artificial Intelligence-assisted Evaluation of Pulmonary HYpertension A Study of Treprostinil to Treat Interstitial Lung Disease Pulmonary Hypertension Efficacy and Safety Evaluation of Tolvaptan in the Treatment of Patients With RHF Caused by PAH Inhaled iMatinib Pulmonary Arterial Hypertension Clinical Trial – Follow Up Long Term Extension (IMPAHCT-FUL) Genetics of Pulmonary Hypertension a Non-interventional Study of Sildenafil in the Treatment of Pulmonary Arterial Hypertension (PAH) in Adults From China Home-based Pulmonary Rehabilitation With Remote Monitoring in Pulmonary Arterial Hypertension Empagliflozin in Pulmonary Arterial Hypertension ADAMTSL4 in Idiopathic Pulmonary Hypertension and CTEPH The MObile Health InterVEntion in Pulmonary Arterial Hypertension (MOVE PAH) Study PET Image in PAH Patients Evaluation of the Strength of Handgrip in Patients With Pulmonary Artery Hypertension Efficacy and Safety Study of Ambrisentan in Chinese Patients With Pulmonary Arterial Hypertension Management of Acute Pulmonary Hypertensive Crisis in Children With Known Pulmonary Arterial Hypertension A Study of Single and Multiple Doses of Different Formulations of a Prostacyclin Receptor Agonist Assessing the Repeatability of NT-proBNP Testing Using Laboratory and Point of Care Testing in PAH Algorithms to Diagnose Pulmonary Arterial Hypertension COMPression of Left Main coRonary artEry in patientS With Pulmonary Arterial Hypertension aSymptomatIc fOr aNgina National Registry and Cohort Study of Pulmonary Vascular Disease Prognostic Value of the Evaluation of Right Ventricular Function by Portable Ultrasound in Patients With Pulmonary Hypertension. A Dose Escalation Study to Evaluate the Effect of RT234 in Subjects With Pulmonary Arterial Hypertension Developing Hyperpolarized 129Xe MRI Biomarkers for Evaluation of Pulmonary Arterial Hypertension A nUtrition and Lifestyle Intervention in Patients With Pulmonary Arterial HypertensIon Evaluation of the Influence of Face Masks on the Outcome of the 6MWD and Quality of Life in Patients With Pulmonary Hypertension Exercise Training in Patients With Pulmonary Arterial Hypertension Effect of CS1 in Subjects With Pulmonary Arterial Hypertension a Study to Evaluate the Pharmacokinetics and Safety of TPN171H Tablets in Patients With Renal Insufficiency and Healthy Subjects A Study of a Mean Pulmonary Artery Pressure-Targeted Approach With Early and Rapid Treprostinil Therapy to Reverse Right Ventricular Remodeling in Participants With Pulmonary Arterial Hypertension Study of the Pharmacokinetics and Safety of TPN171H Tablets in Subjects With Mild ,Moderate Hepatic Insufficiency and Normal Liver Function Dapagliflozin in Pulmonary Arterial Hypertension A Study of Macitentan in Japanese Pediatric Participants With Pulmonary Arterial Hypertension A Study to Evaluate the Efficacy, Safety and Pharmacokinetics of Treprostinil Palmitil Inhalation Powder in Participants With Pulmonary Arterial Hypertension Study of Efficacy and Safety of LTP001 in Pulmonary Arterial Hypertension Exercise Capacity Respiratory Muscle Strength Dyspnea and Physical Activity in Pediatric Pulmonary Arterial Hypertension Evaluate Real-World Use of Next Generation Infusion Pumps to Administer Remodulin Evaluation of Respiratory Muscle in Patient With Pulmonary Arterial Hypertension Data Analysis for Drug Repurposing for Effective Alzheimer’s Medicines (DREAM)- PDE5 Inhibitors vs Endothelin Receptor Antagonist A Study of AV-101 (Dry Powder Inhaled Imatinib) in Patients With Pulmonary Arterial Hypertension (PAH) Effect of BIA 5-1058 400 mg on the Steady State Pharmacokinetics of Sildenafil Effect of BIA 5-1058 400 mg on Warfarin Pharmacokinetics Effect of BIA 5-1058 400 mg on the Steady State Pharmacokinetics of Bosentan Effect of Age-gender on the Pharmacokinetic and Pharmacodynamic Profiles of BIA 5 1058 Absorption, Distribution, Metabolism and Excretion of BIA 5-1058 Effect of Food on BIA 5-1058 Xenon MRI Pulm Hypertension Treatment With Ambrisentan in Patients With Borderline Pulmonary Arterial Hypertension Metabolic Remodeling in Pulmonary Arterial Hypertension (PAH) Effects of Riociguat on RIght VEntricular Size and Function in PAH and CTEPH A Study of Real-world Cohort of Pulmonary Arterial Hypertension (PAH) Participants Apabetalone for Pulmonary Arterial Hypertension Carnitine Consumption and Augmentation in Pulmonary Arterial Hypertension Safety, Tolerability, & Pharmacokinetics Study of Single & Multiple Inhaled Doses of Imatinib Inhalation Solution A Study of Sotatercept in Participants With PAH WHO FC III or FC IV at High Risk of Mortality Microbiota Transplant Therapy for Pulmonary Arterial Hypertension: Early Safety and Feasibility Study Pulmonary Hypertension Biorepository and Registry Study of Sotatercept in Newly Diagnosed Intermediate- and High-risk PAH Patients A Study to Learn About How Well Riociguat Works, How Safe it is and How it is Used Under Real World Conditions in Patients in the United States Who Are Receiving Riociguat for High Blood Pressure in the Arteries That Carry Blood From the Heart to the Lungs (Pulmonary Arterial Hypertension, PAH) Open-label Extension Study of GB002 in Adult Subjects With Pulmonary Arterial Hypertension (PAH) Prevalence of Musculoskeletal Pain and Its Impact on Quality of Life and Functional Exercise Capacity in Patients With Pulmonary Arterial Hypertension A Long-term Follow-up Study of Sotatercept for PAH Treatment Effects of Pulmonary Hypertension Therapy in Atypical Pulmonary Arterial Hypertension Single-Dose, Open Label Study of Treprostinil Palmitil Inhalation Powder (TPIP) In Pulmonary Arterial Hypertension (PAH) Study Roles of Heavy Metals and Essential Metal Dyshomeostasis in Pulmonary Arterial Hypertension Patients Medication Reconciliation in Pulmonary Hypertension A Study of the Efficacy and Safety of MK-5475 in Participants With Pulmonary Arterial Hypertension (MK-5475-007) A Study of Rodatristat Ethyl in Patients With Pulmonary Arterial Hypertension (ELEVATE 2) A Phase 3 Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Efficacy of L606 in Subjects With PAH Effect of BIA 5-1058 on the Steady State Pharmacokinetics of Treprostinil Pulmonary Hypertension Modality of Death and Validation of REVEAL Risk Score Right Atrial Fibrosis in Pulmonary Hypertension Characterization of the Liver Parenchyma Using Parametric T1 and T2 Magnetic Resonance Relaxometry Ketones for Pulmonary Hypertension – Effects on Hemodynamics Platelet Reactivity and Treatment With Prostacyclin Analogues in Pulmonary Arterial Hypertension A Study of Sotatercept for the Treatment of Pulmonary Arterial Hypertension (STELLAR) TROPHY PAH Pivotal Study – TReatment of Pulmonary HYpertension for PAH Pivotal Study A Study of Pulmonary Arterial Hypertension Participants Treated With Macitentan or Selexipag Remote Exercise Program Delivery Using a Mobile Application for Pulmonary Arterial Hypertension Treatment of Pulmonary Arterial Hypertension Using the Aria CV Pulmonary Hypertension System Pilot Study of the Safety and Efficacy of Sulfasalazine in Pulmonary Arterial Hypertension A Study to Investigate Safe and Tolerable Dose of GMA301 Injection in Healthy Volunteers Glucocorticoids and Pulmonary Hypertension A Study of GMA301 in Subjects With Pulmonary Arterial Hypertension Assessment of the TGF-beta Pathway and Micro-RNA in Pediatric Pulmonary Arterial Hypertension Acute Haemodynamic Study of TPN171H in Patients With Pulmonary Arterial Hypertension GB002 in Adult Subjects With Pulmonary Arterial Hypertension (PAH) Anxiety Self-management Intervention for Pulmonary Hypertension HRV as a Marker of Treatment Response in PAH Arterial Hypertension A Study of Selexipag Assessing Right Ventricular Remodeling in Pulmonary Arterial Hypertension by Cardiac Magnetic Resonance Imaging Positioning Imatinib for Pulmonary Arterial Hypertension A Study to Evaluate Efficacy and Safety of Oral BAY63-2521 in Patients With CTEPH. Extended Access Program to Assess Long-term Safety of Bardoxolone Methyl in Patients With Pulmonary Hypertension RANGER Safety and Effectiveness of PRX-08066 in Patients With Pulmonary Hypertension and Chronic Obstructive Pulmonary Disease Relation Between Mean Pulmonary Artery Pressure and Pulmonary Acceleration Time and Comparison With Previous Formulae Study of the Effect of Four Methods of Cardiopulmonary Resuscitation Instruction on Psychosocial Response of Parents With Infants at Risk of Sudden Death The “Power 15 Study”: Safety Study of Inhalation of Ventavis With the Power Disc-15 Setting Giessen Pulmonary Hypertension Registry and Biobank Pharmacokinetics of Understudied Drugs Administered to Children Per Standard of Care Analysis of the Severity and Prognosis of Pulmonary Hypertension Associated With Bronchiectasis. Pharmacokinetics, Pharmacodynamics, and Safety Profile of Understudied Drugs Administered to Children Per Standard of Care (POPS) : Vascular Function in Health and Disease A Study of Stellate Ganglion Block and / or Reserpine in Group 2 Pulmonary Hypertension Training With Whole Body Vibration Device in Patients With PAH Cardiac Magnetic Resonance Imaging and Pulmonary Perfusion LenusPro Safety (LPS) Study in Patients With PH A Study of Ralinepag to Evaluate Effects on Exercise Capacity by CPET in Subjects With WHO Group 1 PH Mexican Registry of Pulmonary Hypertension A Pilot Study Evaluating Heart and Lung Metabolism in Pulmonary Hypertension Associated With Left Heart Disease Characterization and Detection of Prolonged Endothelin Receptors Antagonists Administration Effect of Exercise and Respiratory Therapy on Right Ventricular Function in Severe Pulmonary Hypertension RV Systolic and Diastolic Function and Contractile Reserve Under Acute Exercise and in Response to Chronic Exercise-based Rehabilitation Assessment of Continuous Measurement of Transcutaneous CO2 for Evaluation of Alveolar Dead Space During Exercise Study on the Use of Inhaled NO (iNO) The Safety and Efficiency of Sildenafil in the Treatment of Severe Post-capillary Pulmonary Hypertension Caused by COPD Sildenafil Effects on Pulmonary Haemodynamics and Gas Exchange in Chronic Obstructive Pulmonary Disease (COPD) Study of Sildenafil Effects in Combination With Rehabilitation in Patients With Chronic Obstructive Pulmonary Disease (COPD) and Associated Pulmonary Hypertension Cell Proliferation in Pulmonary Hypertension. FDG-PET Comparison Between Patients and Healthy Subjects Safety and Efficacy Study of Ambrisentan in Subjects With Pulmonary Hypertension Screening of Pulmonary Hypertension in Methamphetamine Abusers The Effect of Oxygen Therapy on 6MWD in PAH and CTEPH Patients With Hypoxemia Iron Status and Hypoxic Pulmonary Vascular Responses A Study to Assess the Safety and Efficacy of Treprostinil to Facilitate Liver Transplantation in Patients With Portopulmonary Hypertension Acute Exposure of Simulated Hypoxia on Blood and Tissue Oxygenation (aBGA, NIRS) Measurements and Characterization of Doppler Signals From the Right Chest in Pediatric and Adult Patients Effect of Home Rehabilitation on State of Patients With PAH, HFREF and IHD Endothelial Progenitor Cells and Pulmonary Idiopathic Arterial Hypertension Impact of Polymorphism on Pulmonary Pressure in Subjects With Pulmonary Hypertension of Different Cause Sildenafil and Pulmonary Artery Pressure Acute Exposure of High Altitude on Cognitive Function Stress Echo 2020 – The International Stress Echo Study Retrospective Data Analysis of Data From the Zurich PH Registry Effect of Normobaric Hypoxia and Hyperoxia in Patients With Pulmonary Hypertension REVEAL Registry™: Registry to Evaluate Early And Long-term PAH Disease Management The Effects of Commercial Air Travel on Patients Suffering From Pulmonary Hypertension Urban Zen Integrative Therapy for Persons With Pulmonary Hypertension COMPERA / COMPERA-KIDS Safety, Efficacy and Treatment Satisfaction in Patients With PAH Rapidly Switched From Epoprostenol to Remodulin Effect of BIA 5 1058 on Cardiac Repolarization Biomarkers in the Evaluation of Chronic Lung Disease Actigraphy in Pediatric Pulmonary Hypertension Safety, Tolerability, and Pharmacokinetics of Oral Treprostinil in Pediatric PAH Patients Aged 7 to 17 Years The Effect of Renal Impairment on the Pharmacokinetics of Oral Treprostinil Safety, Tolerability, Pharmacokinetics and Pharmacodynamics of BIA 5-1058 Surgical Valvuloplasty for Congenital Mitral Insufficiency Quality of Life Assessed With the PAH SYMPACT Questionnaire Effect of Esomeprazole on the Pharmacokinetics of Oral Treprostinil Carvedilol PAH A Pilot Study of Efficacy and Safety Efficacy of Beraprost in Lowering Pulmonary Arterial Pressure in Children (RIGHT HEART III Study – Right Ventricular Hemodynamic Evaluation and Response to Treatment) Dose-Finding, Safety, Pharmacodynamic Effect Study of Sodium Nitrite Inhalation Solution in Normal, Healthy Volunteers Role of Endothelin-A (ETA) and Endothelin-B (ETB) Receptors in the Vasodilatory Response to Endothelin-3 (ET-3) Trimetazidine in Pulmonary Artery Hypertension A Study Evaluating the Efficacy and Safety of Ralinepag to Improve Treatment Outcomes in PAH Patients Effect of Food on the Pharmacokinetics of Oral Treprostinil Hypotonic Treprostinil Subcutaneous Infusion for Control of Treprostinil Related Site Pain Measuring Blood Pressure in the Lung Circulation With Sonar Technology (Echo-Doppler) Drug Interaction Between Ritonavir And Sitaxsentan Effect Of Rifampin On Pharmacokinetics Of Sitaxsentan A Pharmacokinetic Drug-Drug Interaction (DDI) Study Between Sitaxsentan And Sildenafil, And Between Sitaxsentan And Tadalafil After Multiple Doses A Bioavailability Study Comparing Treprostinil Diethanolamine Oral Tablets and Oral Solution in Healthy Volunteers Comparative Bioavailability of Treprostinil Diethanolamine Manufactured by Two Independent Facilities Nitric Oxide, GeNO Nitrosyl Delivery System Local Open-Label Access Study For Patients Who Completed A1481244 Study In Brazil Bosentan and Pulmonary Endothelial Function Eisenmenger Quality Enhancement Research Initiative Retrospective Chart Review of First-time Opsumit® (Macitentan) Users in the United States ADAPT – A Patient Registry of the Real-world Use of Orenitram® 3D Echo Evaluation of the Ventricles in Sclero Associated Severe PAH A Pharmacokinetic Substudy of the TDE-PH-304 Protocol To Compare the Pharmacokinetics of Traclear 62.5 mg Tablets and HGP1206 125mg 1 Tablet in Healthy Male Volunteers A Rising Single Dose Study of the Safety, Tolerability, Pharmacokinetics (PK) and Pharmacodynamics of MK-8892 (MK-8892-001) Clinical Study to Evaluate the Effects of Macitentan on Exercise Capacity in Subjects With Eisenmenger Syndrome Clinical Study to Assess the Long-term Safety, Tolerability, and Efficacy of Macitentan in Subjects With Eisenmenger Syndrome A Non-Interventional, Patient Registry For The Collection Of Pre-Defined Safety Data In Patients Prescribed Thelin Prevalence of Pulmonary Hypertension (PAH) in Patients With Thalassemia Sleep Disordered Breathing in Precapillary Pulmonary Hypertension: Effect of CPAP Treatment Pulmonary Hypertension and Imatinib Single Ascending Dose Study for Evaluation of Safety, Tolerability and Pharmacokinetics of L606 Subcutaneous Elafin in Healthy Subjects Pharmacokinetics, Safety and Tolerability of Treprostinil Inhalation Powder in Healthy Normal Volunteers A Registry for Patients Taking Uptravi Evaluation of the Pharmacodynamic Effect of the Combination of Sildenafil and Riociguat on Blood Pressure and Other Safety Parameters. Repurposing a Histamine Antagonist to Benefit Patients With Pulmonary Hypertension A Study Evaluating the Long-Term Efficacy and Safety of Ralinepag in Subjects With PAH Via an Open-Label Extension Single and Multiple Ascending Doses Clinical Pharmacology Study With KAR5585 Iloprost for the Treatment of Pulmonary Hypertension in Adults With Congenital Heart Disease The Qutenza Patch as Treatment for Disabling Treprostinil (Remodulin) Infusion Site Pain Implantable System for Remodulin Post-Approval Study Impact of Aerobic Training on Sleep Quality and Aerobic Fitness in Male Patients With Pulmonary Artery Hypertension HYPID (Pulmonary Hypertension in Interstitial Lung Disease) EXTENSION Vascular Subphenotypes of Lung Disease in HIV & COPD Pulmonary Hypertension Association Registry Effect of Inhaled Albuterol in Pulmonary Hypertension Effects of Different Types of Physical Training in Patients With Pulmonary Arterial Hypertension. The Efficacy and Safety of Sildenafil Citrate Used in Combination With Intravenous Epoprostenol in PAH Sildenafil Therapy For Subjects Who Derive Clinical Benefit From Continued Treatment With Sildenafil Pulmonary Hypertension in Interstitial Lung Disease Bleeding Frequency Under Anticoagulant Treatment in Pulmonary Hypertension Estimation of Pulmonary Vascular Resistance by Contrast Echocardiography Pharmacokinetic Linearity and Comparative Bioavailability of Treprostinil Diethanolamine Biomarkers in Pulmonary Arterial Hypertension Treated With Nilotinib Revavtio Special Investigation for Long-term Use in Pediatric Patients Comparison of Inhaled Nitric Oxide and Oxygen in Participants Reactivity During Acute Pulmonary Vasodilator Testing Pilot Study Evaluating the Safety and Performance of the GeNO NITROsyl Delivery System for Inhaled Nitric Oxide Tyvaso Dosing and Titration Evaluation: TyTRATE Registry TranspulmonarY Estrogen Gradient and Estrogen Receptors (TYEGER) in PAH 4DFlow Magnetic Resonance Imaging in Patients With Pulmonary Hypertension Associated With Congenital Heart Disease Vardenafil as add-on Therapy for Patients With Pulmonary Hypertension Treated With Inhaled Iloprost Effects of Physical Training on Vascular Function as a Therapeutic Target in Pulmonary Hypertension Effects of DHEA in Pulmonary Hypertension FREEDOM DR: Oral Treprostinil in Combination With an Endothelin Receptor Antagonist (ERA) and/or a Phosphodiesterase-5 (PDE-5) Inhibitor or as Monotherapy for the Treatment of Pulmonary Arterial Hypertension (PAH) Lidocaine Subcutaneous Infusion for Control of Treprostinil Related Site Pain RUS-registry of PH Oral Iron Supplementation in Pulmonary Hypertension OPsumit USers Registry Pulmonary Hypertension and Anastrozole Trial Clinical Study of Pulsed, Inhaled Nitric Oxide Versus Placebo in Symptomatic Subjects With PAH Right Ventricular Pacing in Pulmonary Arterial Hypertension Assessment of Blood Coagulation Disorders in Patients With Pulmonary Hypertension Pediatric Pulmonary Hypertension Network (PPHNet) Informatics Registry A Multi-Center, Open-Label, Multiple Dose, Dose Finding Study Exploring the Safety and Tolerability of Beraprost Sodium Modified Release in PAH Patients Long Acting Phosphodiesterase 5 Inhibitors as Add-on Therapy for Patients With Pulmonary Hypertension Treated With Prostanoids. Skeletal Muscle Mitochondrial Abnormalities and the Metabolic Syndrome in PAH ABI-009, an mTOR Inhibitor, for Patients With Severe Pulmonary Arterial Hypertension Efficacy and Safety of Oral UT-15C Tablets to Treat Pulmonary Arterial Hypertension Effects of Treprostinil on Right Ventricular Structure and Function in Patients With Pulmonary Arterial Hypertension Integrated Diagnostics Characterization of Right Ventricular Diastolic Flow Dynamics in Pulmonary Arterial Hypertension Pulmonary Vascular Disease Phenomics Program PVDOMICS DataBase of pulmoNary hyPertesion in PoLish Population – BNP-PL Long-Term Extension Study of Inhaled Nitric Oxide (iNO) for PAH Educational Training Influence in Patients With PAH(Pulmonary Artery Hypertension) on Inhaled Ventavis Treatment Adherence Evaluated Trough INSIGHT System Phase 2 Extension Study of Ambrisentan in Pulmonary Arterial Hypertension Prevalence of Pulmonary Arterial Hypertension in Patients With Connective Tissue Diseases in Egyptian Patients Early Recognition of Pulmonary Arterial Hypertension in Myelodysplastic and Myeloproliferative Diseases Non-invasive Diagnostics of Pulmonary Hypertension With Dual Energy Computed Tomography Non-invasive Diagnostics of Pulmonary Hypertension With Dual Energy Computed Tomography Adult Congenital Heart Disease Registry (QuERI) TReatment Of Pulmonary HYpertension 1-US Study TReatment Of Pulmonary HYpertension 1 Study Symptomatic Pulmonary Arterial Hypertension After Mitral Valve Surgery An Open Label Access Study For Subjects Who Completed A1481156 Pulmonary Arterial Hypertension in Patients With Direct-Acting Antiviral Medications for Hepatitis C Virus Infection CXA-10 Study in Subjects With Pulmonary Arterial Hypertension PRIMEx – A Study of 2 Doses of Oral CXA-10 in Pulmonary Arterial Hypertension (PAH) Transition From Injectable Prostacyclin Medication to Inhaled Prostacyclin Medication Pilot Randomized Trial of Ambulatory Exercise in Pulmonary Hypertension Phase 2 Study to Assess Safety, Tolerability and Efficacy of Once Weekly SC PB1046 in Subjects With Symptomatic PAH Endothelial Cell Dysfunction in Pulmonary Hypertension Efficacy and Safety of Upfront Combination of ΒΟsentan and ΤΑdalafil in Pulmonary Arterial Hypertension PHIRST-1: Tadalafil in the Treatment of Pulmonary Arterial Hypertension Ranolazine and Pulmonary Hypertension Open-label, Multi-center Protocol to Provide QTI571 to PAH Patients Who Participated in the Extension Study (A2301E1) in Japan Hypertension Study of Ventavis® Inhalation Therapy in the Treatment of Patients With Pulmonary Arterial Hypertension (VENIS) Prognostic Impact of the Evolution of PAH 3 Months After TAVI (HTP-TAVI) Open-label, Clinical Study to Evaluate the Safety and Tolerability of TreT in Subjects With PAH Currently Using Tyvaso A Study to Assess the Safety, Tolerability, and Hemodynamic Response of PB1046 in Subjects With PAH Safety and Tolerability of Rapid Dose Titration of Subcutaneous Remodulin® Therapy in PAH Subjects (RAPID) Study of PAH Subjects With LTOT Use That Have Demonstrated Improved Exercise Tolerance With the Use of Inhaled Nitric Safety and Efficacy of Inhaled Treprostinil in Patients With PAH Comparative PK PD Study in PAH Patients (Fox vs. I-Neb) Angiotensin Converting Enzyme (ACE2), Brain, Gut Dysbiosis in Pulmonary Hypertension Long-Term, Open Label Extension Study of PB1046 in PAH Subjects Following Completion of Study PB1046-PT-CL-0004 PET/MRI in PAH Patients Effect of iNO on Invasively Derived Pulmonary Pressures in Patients With PAH Inhaled Treprostinil for PAH: Open-label Extension Qutenza®-Remodulin® in Pulmonary Arterial Hypertension Patients To Provide Sildenafil Therapy To Eligible Adult Patients With Pulmonary Arterial Hypertension For 112 Weeks Utility of At-home Monitoring of Exercise Capacity by App-based 6-minute Walk Test Long-term Extension Study of the Safety and Pharmacokinetics of QCC374 in PAH Patients Patient Global Impression Questions for Activity-induced Symptoms in Patients With PAH Effects of Spironolactone on Collagen Metabolism in Patients With Pulmonary Arterial Hypertension Drug Therapy and Surgery in Congenital Heart Disease With Pulmonary Hypertension Interventions Against Insulin Resistance in Pulmonary Arterial Hypertension Multi-marker Approach for Risk Assessment in PAH Acute Effects of Benzbromaron on the Pulmonary Circulation Exhaled Breath Olfactory Signature of Pulmonary Arterial Hypertension Long-term Outcomes of Pregnant Women With PAH A Long Term Extension Study Evaluating Safety Of Sildenafil Citrate When Used To Treat Pulmonary Arterial Hypertension (PAH) In Children Dysregulation of Lipid Metabolism and Right Ventricular Function in PAH The Role of Trimetazidine on Right Ventricle Function in Pulmonary Arterial Hypertension Body Volume Regulation in Pulmonary Arterial Hypertension With Right Ventricular Failure Study to Assess the Longterm Safety of Sildenafil Citrate in Patients With Pulmonary Arterial Hypertension Chronic Thrombo-embolic Pulmonary Hypertension: Classification and Long Term Outcome Study Looking at Combination Therapy (Sitaxsentan+Sildenafil) Vs. Monotherapy (Sitaxsentan Alone) SR-PAAS -Sitaxsentan Efficacy And Safety Trial With A Randomized Prospective Assessment Of Adding Sildenafil Study of Incidence of Respiratory Tract AEs in Patients Treated With Tyvaso® Compared to Other FDA Approved PAH Therapies Clinical Study of Adipose Derived Mesenchymal Stem Cells for Treatment of Pulmonary Arterial Hypertension Revatio Portal-Pulmonary Arterial Hypertension Trial FREEDOM-C: Oral Treprostinil in Combination With an Endothelin Receptor Antagonist (ERA) and/or a Phosphodiesterase-5 (PDE-5) Inhibitor for the Treatment of Pulmonary Arterial Hypertension (PAH) Safety and Efficacy of Sitaxsentan in the Treatment of Pulmonary Arterial Hypertension Safely Change From Bosentan to Ambrisentan in Pulmonary Hypertension FREEDOM – M: Oral Treprostinil as Monotherapy for the Treatment of Pulmonary Arterial Hypertension (PAH) Smoking: a Risk Factor for Pulmonary Arterial Hypertension? DNA Methylation Dynamics Underlying Arterial Remodeling in PAH Patients: CLEOPAHTRA Clinical Trial Prospective Longitudinal Study of Patients With Idiopathic Pulmonary Arterial Hypertension, Family or Taking Anorectics The Efficacy and Safety of Vardenafil in the Treatment of Pulmonary Arterial Hypertension Sitaxsentan Efficacy And Safety Trial With A Randomized Prospective Assessment Of Adding Sildenafil (SR-PAAS) Impact of Inhaled Treprostinil Sodium on Ventilation Perfusion Matching Upfront Combination Pulmonary Arterial Hypertension Therapy MIF- Thyroxine Interactions in the Pathogenesis of Pulmonary Arterial Hypertension Safety, Tolerability, and PK Parameters of Sodium Nitrite Inhalation Solution in Healthy Subjects ARIES – Ambrisentan in Patients With Moderate to Severe Pulmonary Arterial Hypertension (PAH) BPS-314d-MR-PAH-303 (BEAT OLE) Effects of Oral Sildenafil on Mortality in Adults With PAH Inspiratory Muscle Training in Pulmonary Arterial Hypertension Dose Determination Safety and Activity Study of Inhaled NX1011 to Treat Pulmonary Arterial Hypertension Trial of Iloprost Inhaled Solution as Add-On Therapy With Bosentan in Subjects With Pulmonary Arterial Hypertension (PAH) Phase III Randomized Study of UT-15 in Patients With Primary Pulmonary Hypertension Hemodynamic Evaluation of Dose-response and Safety of Dry Powder Inhalation of Treprostinil Efficacy and Safety of Oral Bosentan in Pulmonary Arterial Hypertension Class II A Study to Investigate the Efficacy of PADN to Improved Functional Capacity and Hemodynamics in Patients With PAH A Study to Evaluate GSK1325760A – a Long-Term Extension Study Evaluation of Pulmonary Perfusion Heterogeneity and Compliance in Patients With Pulmonary Hypertension Using Positron Emission Tomography Imaging A Study of Single Doses of MK -5475 on Pulmonary Vascular Resistance (MK-5475-002) Registry for Pulmonary Hypertension in China Study of the Initial Combination of Bosentan With Iloprost in the Treatment of Pulmonary Hypertension Patients LenusPro Pump in PAH Treated With Treprostinil Study of Cardiac MRI in the Follow up Assessment of Patients With PAH (EVITA) Beraprost-314d Added-on to Tyvaso® (BEAT) Effect of Pharmacologic Interaction Between ERAs and PDE-5 Inhibitors on Medication Serum Levels and Clinical Disease Status in Patients With PAH FDG Uptake and Lung Blood Flow in PAH Before and After Treatment With Ambrisentan Safety, Efficacy, and Treatment Satisfaction Switching From Flolan to Remodulin Using the Crono Five Ambulatory Pump in Patients With PAH Repeatability and Sensitivity to Change of Non-invasive Endpoints in PAH Impact of Rehabilitation Program on PAH Patients Treated With Macitentan. Study to Assess Acute Vasodilation Response of Inhaled Nitric Oxide The Effect of Adding Exercise Training to Optimal Therapy in PAH Hemodynamic Response After Six Months of Sildenafil Riociguat rEplacing PDE-5i Therapy evaLuated Against Continued PDE-5i thErapy PAHTCH Pulmonary Arterial Hypertension Treatment With Carvedilol for Heart Failure (Carvedilol) Non-interventional Multi-center Study on Patients Under Routine Treatment of Pulmonary Arterial Hypertension (PAH) With Inhaled Iloprost Using I-Neb as a Device for Inhalation Endothelial Function in Patients With Pulmonary Arterial Hypertension A Study to Evaluate Efficacy and Safety of Oral BAY63-2521 in Patients With Pulmonary Arterial Hypertension (PAH) The Expression and Significance of MiRNA Treprostinil Combined With Tadalafil for Pulmonary Hypertension The “VISION” Trial: Ventavis Inhalation With Sildenafil to Improve and Optimize Pulmonary Arterial Hypertension Pharmacokinetics, Safety and Efficacy of BIA 5-1058 in PAH Trial to Evaluate Parenteral Treprostinil and Riociguat on Right Ventriculo-vascular Coupling and Morphology in Those With Advanced PAH Clinical Trial to Evaluate the Long-term Safety of Udenafil in Patient With PAH Effects of RT234 on Exercise Parameters Accessed by CPET in Subjects With PAH Olaparib for PAH: a Pilot Study Rehabilitation for Patients With Pulmonary Arterial Hypertension Biomarkers in the Diagnosis and Assessment of Pulmonary Arterial Hypertension (PAH) Clinical Investigation Into Inhaled Treprostinil Sodium in Patients With Severe Pulmonary Arterial Hypertension (PAH) Olaparib for PAH: a Multicenter Clinical Trial Phase 2 Study of Ambrisentan for Liver Function Test Rescue in Pulmonary Arterial Hypertension Safety of Transition From Selexipag to Remodulin® Then Oral Treprostinil in Symptomatic Adult PAH Study Of Right Ventricular Performance In PAH Patients Treated With Rapid Dose Treprostinil (Remodulin) Exercise Capacity and Quality of Life in Patients With PPH Receiving Short Term Oral L-Citrulline Malate BREATHE 5-OL: Tracleer (Bosentan) in Patients With Pulmonary Arterial Hypertension Related to Eisenmenger Physiology Genes Associated With Development of Pulmonary Arterial Hypertension in Patients With Congenital Shunt Lesions Tamoxifen Therapy to Treat Pulmonary Arterial Hypertension Pulmonary Arterial Hypertension Improvement With Nutrition and Exercise (PHINE) ALlogeneic Cardiosphere-derived Stem Cells (CDCs) for Pulmonary Hypertension therApy Crossover Study From Macitentan or Bosentan Over to Ambrisentan Evaluation of Metformin Activity in Addition to Conventional Treatment of Grade II or III Pulmonary Arterial Hypertension (PAH) Clinical Study of Macitentan in Patients With PAH to Psychometrically Validate PAH-SYMPACT Instrument Goal Oriented Strategy to Preserve Ejection Fraction Trial Safety, Pharmacokinetics and Efficacy Study of QCC374 in PAH Patients Combined Use of Radiofrequency-ablation and Balloon-septostomy in the Creation of a Stable Inter-atrial Communication Therapy of Pulmonary Arterial Hypertension (PAH) – Treatment With Sildenafil in Eisenmenger Patients A Study to Assess Whether Macitentan Delays Disease Progression in Children With Pulmonary Arterial Hypertension (PAH) Study of ACT-293987 (NS-304) in Pulmonary Arterial Hypertension (PAH) To Assess The Efficacy and Safety Of Oral Sildenafil in the Treatment of Pulmonary Arterial Hypertension. Remodulin® to Oral Treprostinil Transition Dose-response Study of the Safety and Efficacy of Beraprost Sodium Modified Release (BPS-MR) in Patients With Pulmonary Arterial Hypertension (PAH) Natural History Study of Biomarkers in Pulmonary Arterial Hypertension Combination Therapy in Pulmonary Arterial Hypertension Correlation of LONGterm Wrist ACTigraphy Recorded Physical Performance & 6-minute Walk Distance in Patients With Pulmonary Arterial Hypertension An Open-Label Extension of BPS-MR-PAH-201 in Pulmonary Arterial Hypertension (PAH) Patients Safety and Efficacy of APD811 in Pulmonary Arterial Hypertension Epoprostenol for Injection in Patients With Pulmonary Arterial Hypertension Efficacy of Ventavis Used in Real-life Setting. A Long-Term, Open-Label Study to Evaluate the Safety of Sitaxsentan Sodium Treatment in Patients With Pulmonary Arterial Hypertension FUTURE 3 Study Extension Open Label Study of Sildenafil in Patients With Pulmonary Arterial Hypertension Long Term Safety and Efficacy of Ralinepag in Pulmonary Arterial Hypertension Extension of BPS-MR-PAH-203 in Pulmonary Arterial Hypertension (PAH) Patients Study of Cicletanine for Pulmonary Arterial Hypertension (PAH) The PAH Platform for Deep Phenotyping in Korean Subjects Testing of HIV Protease Inhibitors to Suppress Inflammation and Improve Cardio Pulmonary Hemodynamics in Subjects With Pulmonary Arterial Hypertension Beta-blockers in Pulmonary Arterial Hypertension Effects of the Combination of Bosentan and Sildenafil Versus Sildenafil Monotherapy on Pulmonary Arterial Hypertension (PAH) A Transition Study From Flolan® to Remodulin® in Patients With Pulmonary Arterial Hypertension Phase III Clinical Worsening Study of UT-15C in Subjects With PAH Receiving Background Oral Monotherapy Assess the Efficacy and Safety of Sildenafil When Added to Bosentan in the Treatment of Pulmonary Arterial Hypertension Screening of Pulmonary Arterial Hypertension in BMPR2 Mutation Carriers Bronchodilator’s Effects on Exertional Dyspnoea in Pulmonary Arterial Hypertension Study of BSF 208075 Evaluating Exercise Capacity in Patients With Pulmonary Arterial Hypertension Pulmonary Arterial Hypertension Quality Enhancement Research Initiative Extension Program Safety Evaluation of Inhaled Treprostinil Administration Following Transition From Inhaled Ventavis in Pulmonary Arterial Hypertension (PAH) Subjects Safety Study of PLX-PAD Cells to Treat Pulmonary Arterial Hypertension (PAH) Effect of BMPR-2 Gene Mutations on Hemodynamic Response by Iloprost Inhalation in Pulmonary Arterial Hypertension Extension Study for Participants in LIQ861 Trials to Evaluate the Long-term Safety of Dry Powder Inhalation of Treprostinil Investigation of the Safety and Pharmacology of Dry Powder Inhalation of Treprostinil Effects of Iloprost Treatment in Adult Patients With Pulmonary Arterial Hypertension Related to Congenital Heart Disease Biomarkers in Pediatric Congenital Heart Disease and PAH The PAH Disability and Bothersomeness Questionnaire Efficacy, Safety, Tolerability and Pharmacokinetics (PK) of Nilotinib (AMN107) in Pulmonary Arterial Hypertension (PAH) Correlation OF Hemodynamics in Pulmonary Hypertension With Perfusion Lung Scans Acute Response of Iloprost Inhalation Using the Breelib Nebulizer in Pulmonary Arterial Hypertension Assessmet of Patients With PAH Right Ventricular Volume Imaging Control Study, 3D Echo, MR and RHC. [18F]FES PET/CT in PAH Home-based Exercise Training in Patients With Pulmonary Arterial Hypertension: Effect on Skeletal Muscular Function and Metabolism Reversible Secondary Myelofibrosis or Clonal Myeloproliferative Disorder Early Detection of Pulmonary Arterial Hypertension Using Cardiac Magnetic Resonance Imaging Ventavis® Registry Protocol Effect of Morphine on Dyspnea and 6-Minute Walk Distance in Pulmonary Arterial Hypertension A Randomized, Double-Blind, Placebo-Controlled Study of Sildenafil in Children With Pulmonary Arterial Hypertension. TRUST-2: Safety and Efficacy of Intravenous Remodulin® in Patients in India With Pulmonary Arterial Hypertension (PAH) Clinical Study to Assess the Long-term Safety and Tolerability of ACT 064992 in Patients With Symptomatic Pulmonary Arterial Hypertension Open Label Access Study Of Sildenafil In Adult Patients With Pulmonary Arterial Hypertension Completing A1481244 Study 3D Imaging: Prognostic Role in Pulmonary Arterial Hypertension Study to Assess the Tolerability and the Safety of the Transition From Inhaled Treprostinil to Oral Selexipag in Patients With Pulmonary Arterial Hypertension Study to Compare Triple Therapy (Oral Treprostinil, Ambrisentan, and Tadalafil) With Dual Therapy (Ambrisentan, Tadalafil, and Placebo) in Subjects With Pulmonary Arterial Hypertension Safety, Tolerability, Pharmacokinetics and Efficacy of Two Different Rates of Subcutanous Remodulin® Dose Titration in Pulmonary Arterial Hypertension Study of Add-on Ambrisentan Therapy to Background Phosphodiesterase Type-5 Inhibitor (PDE5i) Therapy in Pulmonary Arterial Hypertension (ATHENA-1) Safety And Efficacy Of Sildenafil In Children With Pulmonary Arterial Hypertension Safety and Efficacy of Inhaled Iloprost in Pediatric Patients With Pulmonary Arterial Hypertension A Multinational, Multicenter, Study to Assess the Efficacy and Safety of BPS-314d-MR in Subjects With Pulmonary Arterial Hypertension Currently Receiving Treatment With an Endothelin Receptor Antagonist and/or a Phosphodiesterase-5 Inhibitor Ventricular Reversed Remodeling After LTX in PAH Patients Observational Description of Compliance for the Daily Ventavis Use Via the Insight Program in Class III Pulmonary Arterial Hypertension Patients Modulating Effects of Lisinopril on Sildenafil Activity in Pulmonary Arterial Hypertension(PAH)( MELISSA) Pulmonary Artery Denervation for Treatment of Pulmonary Arterial Hypertension A Pulmonary Arterial Hypertension Study With Macitentan to Validate the PAH-SYMPACT™ in France, Italy and Spain Open-Label Extension Study of Ubenimex in Patients With Pulmonary Arterial Hypertension (WHO Group 1) An Open Label Extension Study to Evaluate the Safety of Continued Therapy of Subcutanous Remodulin® in Pulmonary Arterial Hypertension A Clinical Study of to Confirm the Doses of Selexipag in Children With Pulmonary Arterial Hypertension Inhaled Nitric Oxide/INOpulse DS for Pulmonary Arterial Hypertension (PAH) Extension of the Psychometric Validation Study ORCHESTRA in Patients With PAH Efficacy Study of Cardizem in Pulmonary Arterial Hypertension Post Marketing Observational Study in Patients With Pulmonary Arterial Hypertension ACT-293987 in Pulmonary Arterial Hypertension Study to Assess the Safety, Tolerability and Pharmacokinetics (PK) of MK-8892 in Participants With Pulmonary Arterial Hypertension (PAH) (MK-8892-005) A Study of Ranolazine Acute Administration and Short Term Administration in Pulmonary Arterial Hypertension A Long Term Study of Ambrisentan in Pulmonary Arterial Hypertension Subjects Having Completed AMB-320 (NCT00423748) or AMB-321 (NCT00423202) A Study of Ubenimex in Patients With Pulmonary Arterial Hypertension (WHO Group 1) A Study of Sotatercept for the Treatment of Pulmonary Arterial Hypertension (PAH) Acute Dosing of MK-8892 in Participants With Pulmonary Arterial Hypertension (PAH) (MK-8892-003) The Efficacy and Safety of Initial Triple Versus Initial Dual Oral Combination Therapy in Patients With Newly Diagnosed Pulmonary Arterial Hypertension Clinical Study Evaluating the Effects of First-line Oral cOmbination theraPy of maciTentan and tadalafIl in Patients With Newly Diagnosed pulMonary Arterial Hypertension (OPTIMA) A Phase 3, Randomized, Double-Blind, Placebo-Controlled Study to Assess Safety and Efficacy of Ambrisentan in Subjects With Pulmonary Arterial Hypertension. A Study of Sotatercept for the Treatment of Pulmonary Arterial Hypertension Clinical Study of Inhaled GB002 for Treatment of WHO Group I Pulmonary Arterial Hypertension An Open-Label, Long-Term Study of Oral Treprostinil in Subjects With Pulmonary Arterial Hypertension Estrogen Receptor Antagonist in Patients With Pulmonary Arterial Hypertension Fluoxetine in Pulmonary Arterial Hypertension (PAH) Trial Safety and Efficacy of Pulmonary Artery Denervation in Patients With Pulmonary Arterial Hypertension A Clinical Study to Investigate the Long-term Safety of the Drug Macitentan in Patients With Pulmonary Arterial Hypertension Who Were Previously Treated With Macitentan in Clinical Studies. Study to Assess Safety and Efficacy of Ambrisentan in Subjects With Pulmonary Arterial Hypertension. EXPEDITE: A Study of Remodulin Induction Followed by Orenitram Optimization to Treat Pulmonary Arterial Hypertension A Phase 2 Study to Determine the Safety and Efficacy of AIR001 in Subjects With Pulmonary Arterial Hypertension (PAH) Effect of Selexipag on Daily Life Physical Activity of Patients With Pulmonary Arterial Hypertension. An Open-Label Extension Trial of UT-15C SR in Subjects With Pulmonary Arterial Hypertension BEET PAH: a Study to Assess the Effects of Beetroot Juice in Patients With Pulmonary Arterial Hypertension Efficacy and Safety Study of Udenafil in Patient With Pulmonary Arterial Hypertension(PAH) Long-term Study of AIR001 in Subjects With WHO Group 1 Pulmonary Arterial Hypertension Who Completed AIR001-CS05 Anastrozole in Patients With Pulmonary Arterial Hypertension Tezosentan in Patients With Pulmonary Arterial Hypertension Coenzyme Q-10 and Pulmonary Arterial Hypertension Sorafenib Study: Dosing in Patients With Pulmonary Arterial Hypertension (PAH) Study Providing Monotherapy (Sitaxsentan) And Combination Therapy (Sitaxsentan+Sildenafil) To Subjects With Pulmonary Arterial Hypertension (PAH) To Assess Long-Term Safety Addition of UT-15C SR to Pulmonary Arterial Hypertension Patients Currently Receiving Tyvaso® Oxygen Treatment and Pulmonary Arterial Hypertension A Therapeutic Open Label Study of Tocilizumab in the Treatment of Pulmonary Arterial Hypertension Pilot Chart Review Study Of Sitaxentan Sodium (Thelin) In Patients With Pulmonary Arterial Hypertension (PAH) Pilot Study of the Safety and Efficacy of Carvedilol in Pulmonary Arterial Hypertension Feasibility of Slow-paced Respiration Therapy for Treatment of a Symptom Cluster in Pulmonary Arterial Hypertension Epoprostenol for Injection (EFI/ACT-385781A) – Pulmonary Arterial Hypertension Selonsertib in Adults With Pulmonary Arterial Hypertension A Study of RVT-1201 in Patients With Pulmonary Arterial Hypertension (ELEVATE 1) Safety and Efficacy Study of Transplantation of EPCs to Treat Idiopathic Pulmonary Arterial Hypertension Safety and Efficacy Study of Transplantation of EPCs to Treat Idiopathic Pulmonary Arterial Hypertension Pilot Study of the Safety and Efficacy of Anakinra in Pulmonary Arterial Hypertension The Combination Ambrisentan Plus Spironolactone in Pulmonary Arterial Hypertension Study Tezosentan in Pulmonary Arterial Hypertension Oral CXA-10 in Pulmonary Arterial Hypertension Neuromuscular Electrical Stimulation in Pulmonary Arterial Hypertension Beta Blockers for Treatment of Pulmonary Arterial Hypertension in Children Beta-blockers in i-PAH Cardiac Function and Exercise Capacity in Pulmonary Arterial Hypertension (-)-Epicatechin and Pulmonary Arterial Hypertension DelIVery for Pulmonary Arterial Hypertension (PAH) Spironolactone for Pulmonary Arterial Hypertension Observation Study With Implantable Medication Pump for Intravenous Treprostinil Therapy in Patients With Pulmonary Arterial Hypertension Reducing Right Ventricular Failure in Pulmonary Arterial Hypertension (RELIEVE-PAH) Transforming Growth Factor Beta Signalling in the Development of Muscle Weakness in Pulmonary Arterial Hypertension Obstructive Sleep Apnea in Pulmonary Arterial Hypertension (OSA in PAH) Rt Ventricular Substrate Metabolism as a Predictor of Rt Heart Failure in Patients With Pulmonary Arterial Hypertension A Mobile Health Intervention in Pulmonary Arterial Hypertension Pharmacokinetic Study of Sub-q and IV Treprostinil in Kids With Pulmonary Arterial Hypertension (PAH) Apabetalone for Pulmonary Arterial Hypertension: a Pilot Study Extension to CQTI571A2102 to Evaluate Long-term Safety, Tolerability and Efficacy of Imatinib in Severe Pulmonary Arterial Hypertension (PAH) Angiogenic Imaging in Pulmonary Arterial Hypertension Outcome Study Assessing a 75 Milligrams (mg) Dose of Macitentan in Patients With Pulmonary Arterial Hypertension A Pharmacokinetics Study for Pediatric Participants With Pulmonary Arterial Hypertension Imatinib (QTI571) in Pulmonary Arterial Hypertension Study to Evaluate Efficacy and Safety of JTT-251 in Participants With Pulmonary Arterial Hypertension Effects of Two Dosing Regimens of Bosentan in Children With Pulmonary Arterial Hypertension Patient Reported Outcomes in Pulmonary Arterial Hypertension Study of Intravenous Remodulin in Patients in India With Pulmonary Arterial Hypertension Physiopathology of Pulmonary Arterial Hypertension: Mechanistic Studies Epoprostenol for Injection in Pulmonary Arterial Hypertension – Extension of AC-066A401 Compassionate Use of Beraprost Sodium 314d Modified Release for Patients With Pulmonary Arterial Hypertension (PAH) Iloprost Power Disc-15 in Pulmonary Arterial Hypertension Study Performed at Various Medical Centers to Learn More About Survival and Expected Course of Pulmonary Arterial Hypertension, a Type of High Blood Pressure in the Lungs Related to the Narrowing of the Small Blood Vessels in the Lungs Epoprostenol for Injection in Pulmonary Arterial Hypertension Study of Macitentan (ACT-064992) on Morbidity and Mortality in Patients With Symptomatic Pulmonary Arterial Hypertension Bosentan in Children With Pulmonary Arterial Hypertension FK506 (Tacrolimus) in Pulmonary Arterial Hypertension Bosentan in Children With Pulmonary Arterial Hypertension Extension Study Evaluate The Clinical Effectiveness, Safety And Tolerability Of Sildenafil Used In Doses ≥20mg TID For The Treatment Of Pulmonary Arterial Hypertension Safety Study of the Switch From Oral Selexipag to Intravenous Selexipag in Subjects With Stable Pulmonary Arterial Hypertension Clinical Study of Macitentan in Patients With Pulmonary Arterial Hypertension to Psychometrically Validate the PAH-SYMPACT Instrument Aerobic Exercise Training in Pulmonary Arterial Hypertension Iron Deficiency In Pulmonary Hypertension Extension to QTI571A2301 to Evaluate the Long-term Safety, Tolerability and Efficacy of Imatinib in Severe Pulmonary Arterial Hypertension (PAH) Genetic Research of Bone Morphogenetic Protein Receptor-II Gene in Taiwanese Patient With Primary Pulmonary Hypertension Safety and Efficacy of Imatinib Mesylate in Patients With Pulmonary Arterial Hypertension Safety and Efficacy of Fluoxetine in Pulmonary Arterial Hypertension Central China Congenital Heart Disease Associated Pulmonary Arterial Hypertension Cohort Study Combined Use of Angiography, Optical Coherence Tomography and Intravascular Ultrasound in Evaluation of Pulmonary Vascular Structure and Function in Patients With Pulmonary Arterial Hypertension Treated With Oral Bosentan Respiratory and Physical Therapy in Patients With Associated Pulmonary Arterial Hypertension (APAH) With Congenital Heart Defects Right Ventricular Metabolism in Pulmonary Arterial Hypertension The Early Recognition of Pulmonary Arterial Hypertension Safety Study Extension of Iloprost Power 15 in Pulmonary Arterial Hypertension BMPR2 Mutations and Iron Metabolism in Pulmonary Arterial Hypertension Sildenafil to Tadalafil in Pulmonary Arterial Hypertension (SITAR) Responsiveness of Exercise Tests in Pulmonary Arterial Hypertension REPAIR: Right vEntricular Remodeling in Pulmonary ArterIal hypeRtension IV Iron Replacement for Iron Deficiency in Idiopathic Pulmonary Arterial Hypertension (IPAH) Patients Prevalence of the Hyperventilation Syndrome in Pulmonary Arterial Hypertension Iloprost Power 15 in Pulmonary Arterial Hypertension Selexipag (ACT-293987) in Pulmonary Arterial Hypertension Resynchronisation Therapy of Right Ventricle in Pulmonary Arterial Hypertension The Study of Apelin-APJ System on Pulmonary Hypertension Patients and Healthy Subjects Proof of Concept Study of IMMUNOadsorption Therapy in Patients With Idiopathic Pulmonary Arterial Hypertension Repeatability of OCT and IV-US in Pulmonary Arterial Hypertension Albuterol and Dynamic Hyperinflation in Idiopathic Pulmonary Arterial Hypertension National Cohort Study of Idiopathic and Heritable Pulmonary Arterial Hypertension 6R-BH4 Pulmonary Arterial Hypertension Study Pharmacokinetic Effects of QTI571 on Sildenafil and Bosentan in Pulmonary Arterial Hypertension Patients Safety and Feasibility of Autologous Endothelial Progenitor Cells Transplantation in Patients With Idiopathic Pulmonary Arterial Hypertension