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Global registry aims to improve heart pacing for rhythm disorders

NCT ID NCT04831125

Knowledge-focused Sponsor: University of Chicago 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study gathered information from 383 people with slow heartbeats or heart failure who received a special type of pacemaker called conduction system pacing. Researchers looked at how well the device worked, any complications, and changes in heart function over 12 months. The goal was to learn more about the strengths and limits of this pacing method to guide future treatments.

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

383 people

The number who actually took part.

Started

Apr 2021

Finished

Feb 2026

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

Individuals receiving conduction system pacing * Any presence of symptomatic bradyarrhythmia requiring pacing therapy * Any presence of heart failure (HF) with evidence of wide QRS or anticipated requirement for \>40% ventricular pacing

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: * Meets American College of Cardiology (ACC)/American Heart Association (AHA)/Heart Rhythm Society (HRS) guidelines for bradycardia, or * Meets ACC/AHA/HRS guidelines for cardiac resynchronization therapy (CRT). Exclusion Criteria: * Age \< 18 years * Inability of patient capacity to provide consent for themselves either due to medical or psychiatric comorbidity * Pregnancy * Difficulty with follow-up

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Conditions

The condition(s) this trial relates to.

Bradycardia heart failure

As listed by the trial registrant

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

Bradyarrhythmia Heart failure

Contacts and locations

Locations

  • Geisinger Wyoming Valley Medical Center

    Wilkes-Barre, Pennsylvania, 18711, United States

  • Health Research Institute Hospital La Fe

    Valencia, Spain

  • Icahn School of Medicine at Mount Sinai & Mount Sinai Hospital

    New York, New York, 10029, United States

  • Lund University

    Lund, Sweden

  • Maastricht University Medical Center

    Maastricht, Netherlands

  • University of Arizona

    Tucson, Arizona, 85719, United States

  • University of Chicago

    Chicago, Illinois, 60637, United States

  • University of Pennsylvania

    Philadelphia, Pennsylvania, 19104, United States

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