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Why do some hearts slow down after pulsed field ablation?

NCT ID NCT07809347

Knowledge-focused Sponsor: Wroclaw Medical University Source: ClinicalTrials.gov ↗

What the study statuses mean

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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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Sep 09, 2026 · Last updated Sep 10, 2026 · Updated 1 time

Summary

Researchers at Wroclaw Medical University are studying what factors are linked to slow heartbeats, called bradycardia, in patients recovering from pulsed field ablation for atrial fibrillation. The study enrolls about 100 people who have this procedure, which uses pulsed energy to isolate the pulmonary veins under general sedation. The team checks heart rate on the first ECG after the procedure and again the next day, and records whether any patient needs medical treatment for a slow heartbeat. The goal is to understand which patient or procedure factors are associated with bradycardia during the hospital stay.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
pulmonary vein isolation using pulsed field ablation
What this could lead to
If researchers identify which factors predict slow heartbeats after pulsed field ablation, doctors could monitor at-risk patients more closely and tailor recovery care.
What could go wrong
This is a small observational study at one center, so its findings may not apply to other hospitals or patients. It measures heart rate patterns rather than testing a treatment, so it cannot prove what causes bradycardia.

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 100 people

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

Started

Jan 2026

Expected to finish

Dec 2026

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

Consecutive patients undergoing PVI using PFA for the treatment of atrial fibrillation.

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: \- Pulmonary vein isolation performed with PFA Exclusion Criteria: * Permanent pacemaker * CRT device * Dual-chamber ICD * Cardiac tamponade * Acute stroke * Acute bleeding requiring surgical intervention

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Conditions

The condition(s) this trial relates to.

atrial fibrillation Bradycardia

As listed by the trial registrant

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

Atrial fibrillation (AF) Bradycardia Pulsed field ablation

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

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Contacts and locations

Locations

  • Institute of Heart Diseases, Wroclaw Medical University

    RECRUITING

    Wroclaw, Lower Silesian Voivodeship, 50-556, Poland

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