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Can a simple ultrasound predict the best pacemaker for heart failure?

NCT ID NCT06689111

Disease control Sponsor: University Hospital of Patras 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 100 people with heart failure who need a special pacemaker. Doctors want to see if a heart ultrasound before the procedure can predict which pacing method—left bundle branch pacing or standard biventricular pacing—works better. The goal is to improve how well the heart pumps blood right after the device is implanted.

What this could mean

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

Active substance
Left bundle branch pacing lead (device) and standard biventricular pacing device
What this could lead to
If successful, this could help doctors choose the best pacing method for each heart failure patient, potentially improving heart function more effectively.
What could go wrong
This is a small, non-randomized study, so results may not apply to all patients. The improvement measured is acute (short-term), and long-term benefits are not yet known.

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 2024

Expected to finish

Nov 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.

Ages

18 to 90 years

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: * \>18 years \< 90 years * Patients with a documented indication for resynchronization therapy \[symptomatic patients despite optimal medication, HFrEF (EF\<35%), LBBB QRS morphology\] * COMPLETE LBBB (LBBB defined as QRS\>130msec, wide "notched or slurred" R wave in leads I, aVL, V5, V6 and occasional RS pattern in V5, V6, absence of Q waves in leads I, V5 and V6 but in lead aVL narrow Q wave may be present in the absence of myocardial pathology, R peak time \>60ms in leads V5 and V6 but normal in leads V1, V2, V3 when small R's are discernible in precardial leads, ST and T usually opposite to QRS direction) * Patients with ntraventricular septum diameter \>8 mm * Written informed consent Exclusion Criteria: * Patients with RBBB or atypical LBBB QRS morphology * Patients eligible for an upgrade procedure (already carring a PM or ICD) * Patients with hypertrophic cardiomyopathy

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Conditions

The condition(s) this trial relates to.

systolic heart failure

As listed by the trial registrant

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

Heart failure with reduced ejection fraction (hfref)

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

  • University Hospital of Patras

    RECRUITING

    Pátrai, Greece, 26504, Greece

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