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Pacemaker patients: researchers hunt for early warning signs of heart damage

NCT ID NCT03475498

Knowledge-focused Sponsor: Eulji University Hospital 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 follows 1,000 people with pacemakers to understand why some develop a condition called pacing-induced cardiomyopathy, where the heart muscle weakens. Researchers will use ECG and echocardiogram tests to find early warning signs. The goal is to better identify high-risk patients and improve long-term outcomes.

What this could mean

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

What this could lead to
If successful, this study could help doctors identify which pacemaker patients are at risk for heart muscle weakness, leading to better monitoring and earlier treatment.
What could go wrong
This is an observational study, not a treatment trial. It will not test any new therapy, and results may take years to emerge. Findings may not apply to all pacemaker 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

About 1,000 people

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

Started

Jan 2018

Expected to finish

Feb 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

The study will enroll at least 1000 device patients from multi-centers in order to identify and assess a determinant of PICM and its clinical outcomes (PICM syndrome)

Ages

20 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: mandatory (1 and 2) and optional (3 or 4) 1. Willng to participate in the study and able to sign informed consent 2. Undertaken ECG and echocardiogram including strain before and after device implantation Exclusion Criteria: 1. Less than 18 years of age 2. Being pregnant or plan to become pregnant 3. Advanced heart failure waiting in heart transplantation 4. Have a life expectancy of less than 1 year

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As listed by the trial registrant

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

Pacemaker complication

How to take part

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

  1. The places running it

    3 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

  • Chung-Ang University Hospital

    RECRUITING

    Seoul, South Korea

  • Chung-Buk University Hospital

    RECRUITING

    Chungju, South Korea

  • Chung-Nam University Hospital

    RECRUITING

    Daejeon, South Korea