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Fainting fix may come at a cost: new study tests exercise limits after heart nerve ablation

NCT ID NCT06440291

Disease control Sponsor: Centre of Postgraduate Medical Education Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 how a procedure called cardioneuroablation (CNA) affects exercise performance in people who faint due to a sudden slow heart rate. CNA stops certain nerves from slowing the heart too much, but it might also make the heart beat faster during exercise. Researchers will measure exercise capacity using a special test before and one year after the procedure in 100 patients.

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.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 100 people

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

Started

May 2023

Expected to finish

Dec 2025

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.

Ages

Children (under 18), adults (18 to 64) and older adults (65 and over)

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

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: * severe, recurrent symptoms due to reflex syncope or recurrent presyncope due to slow heart rate * ECG documented asystole \>3 seconds * ineffective prior non-pharmacological treatment * positive baseline atropine test (sinus rate acceleration \> 30% and no atrio-ventricular block following 2 mg of intravenous atropine) * signed written informed consent Exclusion Criteria: * serious comorbidities precluding general anaesthesia and cardioneuroablation * non-functional sinus arrest or atrio-ventricular block (negative atropine test) * lack of consent to participate in the study

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Conditions

The condition(s) this trial relates to.

Syncope syncope, familial vasovagal Syncope, Vasovagal

As listed by the trial registrant

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

Syncope, vasovagal

How to take part

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

  1. The places running it

    1 site. 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

  • Department of Cardiology, Postgraduate Medical School, Grochowski Hospital

    RECRUITING

    Warsaw, 04-073, Poland

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