Clinical trial Recruiting at 1 site Interventional Ages 18 and up

Comparing two pacing methods for heart failure treatment

Official title: Conduction System Pacing vs Biventricular Resynchronization Therapy in Systolic Dysfunction and Wide QRS: Mortality, Heart Failure Hospitalization or Cardiac Transplant

Run by Hospital Clinic of Barcelona · NCT06105580 · Data updated 2026-11-12

This study is testing which pacing method, conduction system pacing or biventricular pacing, works better for people with heart failure to see if it can help them live longer and avoid hospital visits.

Quick facts

Study typeInterventional
Ages18 Years and up
SexAll
Enrollment320 (estimated)
SponsorHospital Clinic of Barcelona
Academic / other
Locations1 site (Barcelona)
StatusRecruiting
StartedNovember 27, 2023
Main results expectedNovember 2027
Study endsJanuary 2028
Registry record updatedApril 3, 2026
Trial IDNCT06105580 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates include adults aged 18 and older with specific types of heart block and reduced left ventricular ejection fraction.

Probably not a fit

Patients with recent myocardial infarction, unstable angina, or those currently pregnant may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This trial compares conduction system pacing with biventricular pacing in patients suffering from systolic dysfunction and wide QRS. It aims to evaluate the impact of these two pacing strategies on all-cause mortality, heart failure hospitalizations, and the need for cardiac transplants over a 12-month follow-up period. A total of 320 patients will be randomized to receive either pacing method, and various clinical and echocardiographic parameters will be assessed to determine the effectiveness of each approach. The study also seeks to identify predictors of response to the different pacing strategies using advanced imaging techniques.

Why it matters

Potential benefit: If successful, this study could provide insights into more effective pacing strategies for patients with heart failure, potentially improving survival and quality of life.

How similar studies have gone: Previous studies have shown promising results for conduction system pacing, suggesting potential benefits similar to those of biventricular pacing, but this specific comparison is novel.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Patient must indicate acceptance to participate in the study by signing an informed consent document.
* Patient must be ≥ 18 years of age.
* Left bundle branch block, QRS ≥130 and LVEF \<=35%. No indication of stimulation for AV block.
* Non-left bundle branch block, QRS ≥150 and LVEF \<=35%.
* Resynchronization therapy indication for ventricular dysfunction (LVEF \<40%) and indication of cardiac pacing for AV block.
* LVEF \<=35% in NYHA class III or IV, atrial fibrillation and intrinsic QRS \>=130 ms, provided a strategy to ensure biventricular capture is in place.

Exclusion Criteria:

* Myocardial infarction, unstable angina or cardiac revascularization during the previous 3 months.
* Pregnancy.
* Participating currently in a clinical investigation that includes an active treatment.

Where it's running

  • Hospital Clínic de Barcelona
    Barcelona, Spain
    Recruiting

Study contacts

  • Principal investigator: José Mª Tolosana, MD, PhD — Hospital Clínic de Barcelona. Institut d'Investigacions Biomèdiques August Pi i Sunyer
  • Study coordinator: Jose Mª Tolosana, MD, PhD
  • Email: tolosana@clinic.cat
  • Phone: 93 2271778 (2094)

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

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  • Comparing two pacing methods for heart failure patients

    This study is testing whether a new pacing method called conduction system pacing can help heart failure patients just as much as the standard biventricular pacing to improve their heart function.

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  • Comparing Aortix Device to Diuretics for Acute Heart Failure

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    Recruiting at 33 sites Procyrion · Phoenix, Arizona and 49 other locations · NCT05677100

  • Coronary blood flow testing in people with reduced ejection fraction and left bundle branch block after CRT

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  • Evaluating His-Bundle Pacing for Heart Failure Treatment

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  • Myocardial Energetics Across Cardiovascular Disease Spectrum Using 31P-MRS

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.