Study aims to uncover why a deadly lung disease is often diagnosed too late
NCT ID NCT06998329
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looks at how long it takes for people in Brazil to get a correct diagnosis of pulmonary arterial hypertension (PAH), a rare and serious lung disease. Researchers will review medical records of about 139 adults diagnosed in the last five years to find out what causes delays. The goal is to help doctors diagnose PAH earlier, which could lead to better treatment and outcomes.
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Study facts
What this study's own registry entry says, in plain language.
- Participants
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About 139 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jul 2025
- Expected to finish
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Dec 2027
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
Who is studied
The study population consists of adult patients diagnosed with Group 1 Pulmonary Arterial Hypertension (PAH), confirmed by right heart catheterization, who are followed at specialized pulmonary hypertension referral centers in Brazil. Eligible participants must have documented or estimated date of symptom onset and a recorded date of confirmed diagnosis. The study includes patients from diverse geographic regions and healthcare settings to reflect real-world diagnostic practices.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Availability of documented or estimated date of first symptom suggestive of PAH. * Availability of documented date of confirmed PAH diagnosis. Exclusion Criteria: * Patients with pulmonary hypertension not classified as Group 1 (e.g., due to left heart disease, chronic lung disease, or chronic thromboembolic disease). * Patients with insufficient data to determine either the date of symptom onset or the date of confirmed diagnosis. * Patients diagnosed only clinically or by echocardiography, without confirmation by right heart catheterization.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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InCor - Universidade de São Paulo
RECRUITINGSão Paulo, São Paulo, 05048000, Brazil
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