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Heart failure patients grouped by data, not drugs

NCT ID NCT07429396

Knowledge-focused Sponsor: Instituto Politécnico de Leiria Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looks at 200 adults with a type of heart failure called HFpEF. Researchers will use medical records and exercise tests to find different patient groups, or phenotypes. The goal is to better understand these groups, not to test any new treatment. Participants will have their records reviewed and some will do a special exercise test.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

About 200 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Dec 2026

An estimate. Start dates often move.

Expected to finish

May 2028

An estimate. End dates often move.

Lead sponsor

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

Adult patients (≥18 years) with a confirmed diagnosis of heart failure with preserved ejection fraction (LVEF ≥50%) admitted in the Local Health Unit of the Leiria Region since September 2018. The retrospective phase includes electronic health records from approximately 200 patients, used to obtain multimodal datasets for unsupervised clustering. A cross-sectional phase recruits volunteer participants selected for representativeness of the identified phenotypes to undergo cardiopulmonary exercise testing (CPET) for functional characterization. Collected data include sociodemographic variables, clinical history, imaging findings, laboratory biomarkers (e.g., NT-proBNP), therapeutic data and CPET-derived functional parameters.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

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

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria 1. Retropective observational phase (Phase I): * Age ≥18 years; * Established diagnosis of heart failure with preserved ejection fraction (LVEF ≥50%); * Patients receiving care (outpatient or inpatient) at the Local Health Unit of the Leiria Region (ULS RL) since September 2018. 2. Cross-sectional observational phase (Phase II - CPET): * Age ≥18 years; * Established diagnosis of HFpEF; * Selection as a volunteer representative of phenotypes identified in the retrospective clustering analysis; * Provision of written informed consent prior to any study-specific procedures. Exclusion Criteria: 1. Retropective observational phase (Phase I): * Incomplete or inadequate medical records preventing full data extraction. 2. Cross-sectional observational phase (Phase II - CPET): * Medical contraindication or physical inability to perform cardiopulmonary exercise testing (CPET); * Inability to provide informed consent.

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Conditions

The condition(s) this trial relates to.

diastolic heart failure heart failure

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Heart failure Heart failure with preserved ejection fraction (hfpef) Heart failure, diastolic

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    2 sites. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. 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

  • Local Health Unit of the Leiria Region

    Leiria, Leiria District, 2410-197, Portugal

  • ciTechCare - Center for Innovative Care and Health Technology

    Leiria, 2414-016, Portugal

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