Clinical trial Recruiting at 7 sites Interventional Ages 19 and up

Comparing Left Bundle Branch Area Pacing to Right Ventricular Pacing in Heart Patients

Official title: PReventive Effect Of Left Bundle Branch Area Pacing Versus righT vEntricular paCing on All Cause deaTh, Heart Failure Progression, and Ventricular dysSYNChrony in Patients With Substantial Ventricular Pacing (PROTECT-SYNC): Multicenter Prospective Randomized Controlled Trial

Run by Yonsei University · NCT05585411 · Data updated 2026-11-12

This study is testing whether pacing the heart from the left side works better than pacing from the right side for people with slow heartbeats who need help with their heart rhythm.

Quick facts

Study typeInterventional
Ages19 Years and up
SexAll
Enrollment450 (estimated)
SponsorYonsei University
Academic / other
Locations8 sites (Bucheon-si and 7 other locations)
StatusRecruiting
StartedNovember 1, 2022
Main results expectedNovember 1, 2026
Study endsNovember 1, 2026
Registry record updatedJanuary 5, 2026
Trial IDNCT05585411 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are patients aged 19 and older who require a pacemaker and anticipate a high burden of ventricular pacing (>40%).

Probably not a fit

Patients with conditions such as prior heart transplant surgery or those who are 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

The PROTECT-SYNC study is a multicenter, randomized, controlled trial aimed at evaluating the clinical outcomes of Left Bundle Branch Area Pacing (LBBAP) versus Right Ventricular Pacing (RVP) in patients with bradyarrhythmia requiring significant ventricular pacing. A total of 450 patients will be enrolled across seven medical centers in the Republic of Korea over a two-year period, followed by an additional two years of monitoring. The study will assess the impact of these pacing methods on all-cause mortality, heart failure hospitalizations, and other related complications. Participants will be randomly assigned to either the LBBAP or RVP group to determine which method yields better health outcomes.

Why it matters

Potential benefit: If successful, this study could lead to improved heart health and reduced hospitalizations for patients requiring ventricular pacing.

How similar studies have gone: While the approach of LBBAP is gaining interest, this specific comparison with RVP is novel and has not been extensively tested in prior studies.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. At least 19 years old and willing and capable to give informed consent
2. Patients who is willing and able to comply with the prescribed follow-up tests and schedule of evaluations.

3 Scheduled to receive a pacemaker implant 4. Substantial percentage of V pacing rate (\>40%) is anticipated

Exclusion criteria:

1. Incapacitated or unable to read or write
2. Patient who is an indication of ICD or CRT
3. History of prosthetic valve surgery on tricuspid valve
4. Prior myocardial infarction including ventricular septum
5. Life expectancy \< 12 months due to any condition
6. Unavailable for at least 24 months of follow-up visits
7. Pregnant or breastfeeding at the time of signing consent
8. Prior Heart transplant surgery
9. Persistent Left Superior Vena Cava (PLSVC)

Where it's running

  • Bucheon Sejong Hospital
    Bucheon-si, South Korea
    Recruiting
  • GyeongSang National University Changwon Hospital
    Changwon, South Korea
    Recruiting
  • Chungbuk National University Hospital
    Chungju, South Korea
    Recruiting
  • Asan Medical Center
    Seoul, South Korea
    Recruiting
  • Kyunghee University hospital
    Seoul, South Korea
    Recruiting
  • Seoul National University Hospital
    Seoul, South Korea
    Recruiting
Show 2 more locations
  • Seoul Saint Mary's Hospital
    Seoul, South Korea
    Recruiting
  • Yonsei University Health System, Severance Hospital
    Seoul, South Korea
    Not yet recruiting

Study contacts

  • Principal investigator: TaeHoon Kim — Severance Cardiovascular Hospital Yonsei University
  • Study coordinator: TaeHoon Kim
  • Email: thkimcardio@yuhs.ac
  • Phone: +82 02-2228-8467

Similar studies

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

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.