About this trial
TRESPECT is an international, multicenter, observational registry designed to describe the real-world use, effectiveness, and tolerability of parenteral treprostinil in adults with newly diagnosed pulmonary arterial hypertension (PAH). The registry will include patients who initiated subcutaneous or intravenous treprostinil within 12 months of PAH diagnosis.
Both retrospective and prospective data will be collected from routine clinical care. Data will include patient characteristics, PAH treatment patterns, treprostinil dosing and route of administration, functional status, exercise capacity, biomarkers, echocardiographic and hemodynamic parameters, clinical events, and adverse events. Participants will be followed for at least 36 months or until a registry termination criterion is met. The registry is expected to enroll approximately 100 to 300 patients across specialized PAH centers in several European countries.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Adult patient (≥18 years)
Confirmed diagnosis of PAH (i.e. Group 1 as defined by ESC/ERS guidelines)
Initiated on parenteral Treprostinil (SC or IV) anytime from 1/1/2024
Informed consent (prospective data or retrospective chart review, per local regulations)
Disqualifiers
Participation in any interventional trials affecting PAH (including patients from TripleTRE study)
Non-PAH forms of pulmonary hypertension (e.g., ESC-ERS Group 2-5)
Trial population
The registry will include approximately 100-300 adult patients (≥18 years of age) with confirmed pulmonary arterial hypertension (PAH), classified as Group 1 according to the prevailing ESC/ERS guidelines, who initiated parenteral treprostinil administered subcutaneously or intravenously on or after January 1, 2024. Written informed consent will be required for prospective data collection and for retrospective medical chart review, as applicable under local regulations.
Trial design
Cohort
Prospective
Treatments tested in this trial
treprostinil
DrugParenteral treprostinil administered by continuous subcutaneous or intravenous infusion as part of routine clinical care. The decision to initiate treatment, route of administration, starting dose, dose titration, treatment duration, and use of concomitant PAH therapies are determined by the treating physician and are not assigned by the registry. Data on treatment initiation, doses at approximately 2 and 4 weeks, longitudinal dosing, route of administration, tolerability, local site reactions, pain, treatment changes, and clinical outcomes are collected during registry follow-up.
Treatment groups
Trial outcomes
Primary outcomes
Mean Change From Baseline in 6-Minute Walk Distance at Month 12
Mean change in 6-minute walk distance from baseline to Month 12. The 6-minute walk distance is measured in meters. A positive change indicates improvement in exercise capacity.
Number and Percentage of Participants by Change in New York Heart Association Functional Class at Month 12
Number and percentage of participants whose New York Heart Association Functional Class improved, remained unchanged, or worsened from baseline to Month 12. Functional Class ranges from Class I to Class IV, with a higher class indicating greater functional limitation.
Number and Percentage of Participants With Local Administration-Site Reactions During the First 12 Months
Number and percentage of participants experiencing at least one local administration-site reaction associated with subcutaneous or intravenous treprostinil application during the first 12 months after treatment initiation.
Mean Local Pain Score During the First 12 Months
Local pain associated with parenteral treprostinil application will be assessed on a numerical rating scale from 0 to 10. Higher scores indicate greater pain.
Other outcomes
Mean Change From Baseline in N-Terminal Pro-B-Type Natriuretic Peptide at Month 12
Mean change in N-terminal pro-B-type natriuretic peptide concentration from baseline to Month 12.
Mean Change From Baseline in B-Type Natriuretic Peptide at Month 12
Mean change in B-type natriuretic peptide concentration from baseline to Month 12.
Overall survival
Overall survival is defined as the time from initiation of parenteral treprostinil to death from any cause.
Number and Percentage of Participants by Reason for Early Initiation of Parenteral Treprostinil
Number and percentage of participants in each documented category of clinical reason for initiating parenteral treprostinil within 12 months of PAH diagnosis, irrespective of baseline risk category.
Locations
Sponsors and contacts
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