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Heart ablation may change stroke risk – new study investigates

NCT ID NCT05635864

Knowledge-focused Sponsor: Hannover Medical School 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
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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study followed 167 people with atrial fibrillation or flutter who had a catheter ablation procedure. Researchers measured changes in stroke and bleeding risk scores before and 3, 6, and 12 months after ablation. They also compared different monitoring methods, including implantable devices and smartwatches, to detect any return of abnormal heart rhythms.

What this could mean

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

Active substance
catheter ablation
What this could lead to
If successful, this could help doctors better predict stroke and bleeding risks after ablation, improving personalized care for atrial fibrillation patients.
What could go wrong
This is a small, non-randomized study that only measures risk scores, not actual stroke or bleeding events. Results may not apply to all 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.

Participants

167 people

The number who actually took part.

Started

Jun 2021

Finished

Nov 2025

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

Patients planned to undergo first catheter ablation for symptomatic atrial tachyarrhythmias (atrial fibrillation, atrial flutter) will be enrolled.

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: * Symptomatic atrial tachyarrhythmias (atrial fibrillation, atrial flutter) * Planned for 1st right or left atrial ablation * Informed consent * at least 18 years Exclusion Criteria: * Previous left or right atrial ablation * Ineligibility for catheter ablation * History of TIA / stroke * \< 18 years * LA thrombus formation or history of thrombus formation

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Conditions

The condition(s) this trial relates to.

atrial fibrillation atrial flutter Atrial Remodeling Hemorrhage hemorrhagic disease Recurrence stroke disorder

As listed by the trial registrant

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

Atrial fibrillation Atrial flutter Atrial remodeling Bleeding Recurrences Stroke

Contacts and locations

Locations

  • Hannover Medical School

    Hanover, Lower Saxony, 30625, Germany

More trials for these conditions

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