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 type | Interventional |
|---|---|
| Ages | 19 Years and up |
| Sex | All |
| Enrollment | 450 (estimated) |
| Sponsor | Yonsei University Academic / other |
| Locations | 8 sites (Bucheon-si and 7 other locations) |
| Status | Recruiting |
| Started | November 1, 2022 |
| Main results expected | November 1, 2026 |
| Study ends | November 1, 2026 |
| Registry record updated | January 5, 2026 |
| Trial ID | NCT05585411 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
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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
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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.
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Evaluating different approaches to cardiac pacing in patients
This study is testing different ways to place pacemakers in adults to see which methods work best and are safest for patients needing heart support.
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Left Bundle Branch Area Pacing vs Right Ventricular Pacing for Atrial Fibrillation Risk in AV Block
This study tests whether left bundle branch area pacing can lower the chance of developing atrial fibrillation compared with traditional right ventricular pacing in adults with AV block.
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Transjugular implantation of a leadless pacemaker (Aveir VR) for ventricular pacing
This study tests whether placing an Aveir VR leadless pacemaker through the neck vein can safely provide ventricular pacing in adults with bradycardia.
-
Focal Cryoablation vs. Radiofrequency Cardioneuroablation for Bradyarrhythmias
This study tests whether focal cryoablation can treat vagally driven slow heart rhythms as well as traditional radiofrequency ablation in adults with bradycardia or related syncope.
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Left bundle area pacing with Closed Loop Stimulation in dual‑chamber pacemakers
This study tests whether a dual‑chamber pacemaker using left bundle area pacing and Closed Loop Stimulation can reduce device‑detected atrial fibrillation over 24 months in patients with sinus node disease and AV conduction issues.
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Remote ECG monitoring after TAVI
This compares continuous 30-day remote ECG monitoring to standard short-term monitoring for adults after TAVI to see if it detects rhythm problems earlier.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.