Comparing His and Left Bundle Branch Pacing for Heart Failure
Official title: Cardiac Resynchronization Therapy Using His/Left Bundle Branch Pacing vs Biventricular Pacing With a Left Ventricular Epicardial Lead in Patients With Heart Failure (HF) With Left Ventricular Ejection Fraction (LVEF)≤50% and With Either a Wide QRS Complex (>130 ms) or With/Anticipated >40% Pacing Randomized Clinical Trial
Run by Baylor College of Medicine · NCT05650658 · Data updated 2026-11-12
This study is testing whether a new way of pacing the heart can help people with heart failure feel better and stay out of the hospital compared to the usual treatment.
Quick facts
| Study type | Interventional |
|---|---|
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 2136 (estimated) |
| Sponsor | Baylor College of Medicine Academic / other |
| Locations | 71 sites (Gilbert, Arizona and 70 other locations) |
| Status | Recruiting |
| Started | September 13, 2023 |
| Main results expected | June 30, 2029 |
| Study ends | June 30, 2029 |
| Registry record updated | October 2, 2025 |
| Trial ID | NCT05650658 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates include men and women aged 18 and older with heart failure, a left ventricular ejection fraction of 50% or less, and a wide QRS duration.
✕Probably not a fit
Patients with significant coronary artery disease requiring revascularization or those who are pregnant or lactating 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 clinical trial aims to evaluate the effectiveness of His or Left bundle branch pacing compared to standard biventricular pacing in patients with heart failure due to left ventricular systolic dysfunction. The study will assess patient-centered outcomes such as quality of life, physical activity, heart failure hospitalizations, and mortality, as well as safety outcomes related to device complications. Participants will be randomized and monitored over time to determine the best pacing strategy for improving heart failure management.
Why it matters
Potential benefit: If successful, this study could lead to improved heart failure management and better quality of life for patients through optimized pacing techniques.
How similar studies have gone: Other studies have shown promising results with similar pacing approaches, suggesting potential for success in this trial.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Men and women 18 years of age or older. * A LVEF ≤ 50% within 6 months prior to enrollment. * Resting QRS duration ≥130 ms as evidenced by a historical 12-lead ECG prior to enrollment OR anticipated right ventricular pacing \>40% OR device in place with right ventricular pacing \> 40%. * Are optimized on HF guideline directed medical therapy according to current HF published guidelines OR patient's physician will make an effort to start all guideline-directed medical therapy and titrate doses up as permitted by the participant clinical status and co-morbidities prior to implantation procedure. Exclusion Criteria: * Women who are pregnant, lactating, or plan to become pregnant during the course of the trial. * Participants with angiographic evidence of coronary disease who are candidates for coronary revascularization and are likely to undergo coronary artery bypass graft surgery or percutaneous coronary, intervention in the next three (3) months. * Enzyme-positive myocardial infarction within the past three (3) months prior to enrollment. * Coronary artery bypass graft surgery or percutaneous coronary intervention (balloon and/or stent angioplasty) within the past three (3) months prior to enrollment. * Reversible non-ischemic cardiomyopathy (e.g., acute viral myocarditis). * Participants with Chagas disease, cardiac sarcoidosis or amyloidosis. * Expected to receive left ventricular assist device or heart transplantation within 6 months. * Participants with primary severe valvular disease (e.g., aortic stenosis). * Have a life expectancy of less than 12 months. * Participants with irreversible brain damage from preexisting cerebral disease. * Participants with a contrast dye allergy unable or unwilling to undergo pretreatment with steroids and/or diphenhydramine. * Participants participating in any other interventional cardiovascular clinical trial. * Participants who would be unable to comply with the study's follow-up visit schedule; or * Participants who had any prior unsuccessful attempt at implantation of biventricular pacing (BiVP), His Bundle Pacing (HBP), or Left Bundle Branch Pacing (LBBP) device.
Where it's running
-
Mercy Gilbert & Chandler Regional Medical Centers, Gilbert AZ
Gilbert, Arizona, United States Recruiting -
University of Arizona College of Medicine- Phoenix
Tucson, Arizona, United States Recruiting -
University of Arkansas for Medical Sciences (UAMS)
Little Rock, Arkansas, United States Recruiting -
University of California San Diego
La Jolla, California, United States Recruiting -
University of Colorado (Anschutz Medical Campus)
Denver, Colorado, United States Recruiting -
South Denver Cardiology Associates
Littleton, Colorado, United States Recruiting
Show 44 more locations
-
Hartford Hospital
Hartford, Connecticut, United States Recruiting -
Yale University
New Haven, Connecticut, United States Recruiting -
Heart Rhythm Solutions
Davie, Florida, United States Recruiting -
Cleveland Clinic Florida
Palm Beach Gardens, Florida, United States Recruiting -
University of South Florida
Tampa, Florida, United States Recruiting -
Rush University
Chicago, Illinois, United States Recruiting -
University of Chicago
Chicago, Illinois, United States Recruiting -
Northwestern University
Evanston, Illinois, United States Recruiting -
Trustees of Indiana University
Indianapolis, Indiana, United States Recruiting -
Baptist Health Louisville
Louisville, Kentucky, United States Recruiting -
Massachusetts General Hospital
Boston, Massachusetts, United States Recruiting -
Beth Israel Deaconess Medical Center
Boston, Massachusetts, United States Recruiting -
Mayo Clinic
Rochester, Minnesota, United States Recruiting -
HMH Hospitals Corporation
Hackensack, New Jersey, United States Recruiting -
Virtua Health
Marlton, New Jersey, United States Recruiting -
Newark Beth Israel Medical Center
Newark, New Jersey, United States Recruiting -
The Valley Hospital, Inc.
Ridgewood, New Jersey, United States Recruiting -
Lovelace Medical Center
Albuquerque, New Mexico, United States Recruiting -
Weill Cornell Medicine
New York, New York, United States Recruiting -
Icahn School of Medicine at Mount Sinai
New York, New York, United States Recruiting -
MH Mission Hospital LLLP- Asheville Cardiology Associates
Asheville, North Carolina, United States Recruiting -
University of North Carolina
Chapel Hill, North Carolina, United States Recruiting -
Novant Health
Charlotte, North Carolina, United States Recruiting -
The Christ Hospital
Cincinnati, Ohio, United States Recruiting -
The MetroHealth System
Cleveland, Ohio, United States Recruiting -
Cleveland Clinic
Cleveland, Ohio, United States Recruiting -
Oregon Health & Science University
Portland, Oregon, United States Recruiting -
St. Luke's University Health Network
Allentown, Pennsylvania, United States Recruiting -
Lehigh Valley Hospital Inc.
Allentown, Pennsylvania, United States Recruiting -
Penn Medicine Lancaster General
Lancaster, Pennsylvania, United States Recruiting -
University of Pennsylvania
Philadelphia, Pennsylvania, United States Recruiting -
Thomas Jefferson University Hospital
Philadelphia, Pennsylvania, United States Recruiting -
Allegheny-Singer Research Institute
Pittsburgh, Pennsylvania, United States Recruiting -
University of Pittsburg
Pittsburgh, Pennsylvania, United States Recruiting -
Geisinger Commonwealth School of Medicine
Scranton, Pennsylvania, United States Recruiting -
Medical University of South Carolina (MUSC)
Charleston, South Carolina, United States Recruiting -
Baylor College of Medicine
Houston, Texas, United States Recruiting -
St. Mark's Hospital
Salt Lake City, Utah, United States Recruiting -
University of Vermont
Burlington, Vermont, United States Recruiting -
University of Virginia Health System
Charlottesville, Virginia, United States Recruiting -
Inova Heart and Vascular Institute
Falls Church, Virginia, United States Recruiting -
Sentara Healthcare
Newport News, Virginia, United States Recruiting -
Virginia Commonwealth University
Richmond, Virginia, United States Recruiting -
University of Washington
Seattle, Washington, United States Recruiting
+21 more sites. See ClinicalTrials.gov for the full list.
Study contacts
- Principal investigator: Mihail G Chelu, MD, PhD — Baylor College of Medicine
- Study coordinator: Mihail G Chelu, MD, PhD
- Email: leftvsleft@bcm.edu
- Phone: 7137987291
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
-
Using Apple Watch data to predict heart failure outcomes
This study is testing if data from Apple Watches can help predict heart failure problems and the chances of needing to go back to the hospital for patients with heart failure.
-
Pace-and-ablate strategy in atrial fibrillation: who benefits and long-term outcomes
This study looks at adults with atrial fibrillation who underwent AV node ablation with permanent pacing to see who develops pacing-induced problems and how they do long-term.
-
Stepwise withdrawal of ARNI and SGLT2i in HF with normalized ejection fraction
This trial tests whether gradually stopping ARNI and SGLT2i is safe for people whose heart function has recovered after fixing a reversible heart‑disease cause.
-
Pacing decisions guided by risk for pacing-induced heart muscle weakness
This study tests a risk score to predict pacing-induced cardiomyopathy in adults getting heart rhythm devices, to tailor pacing choices.
-
Pulmonary Artery Denervation for a specific type of heart and lung pressure problem
This study tests whether the Enhancor System can safely and effectively help patients with combined pre- and post-capillary pulmonary hypertension due to left heart disease when added to standard therapy.
-
Using omecamtiv mecarbil to treat chronic heart failure with severely reduced ejection fraction
This study is testing if a new drug called omecamtiv mecarbil can help people with severe chronic heart failure live longer and avoid serious heart problems.
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.