Left vs Left Randomized Clinical Trial

NCT ID: NCT05650658

Last Updated: 2025-10-02

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

Get a concise snapshot of the trial, including recruitment status, study phase, enrollment targets, and key timeline milestones.

Recruitment Status

RECRUITING

Clinical Phase

NA

Total Enrollment

2136 participants

Study Classification

INTERVENTIONAL

Study Start Date

2023-09-13

Study Completion Date

2029-06-30

Brief Summary

Review the sponsor-provided synopsis that highlights what the study is about and why it is being conducted.

The investigators aim to prospectively test the comparative effectiveness of His or Left bundle branch pacing in relation to patient centered outcomes (quality of life, physical activity, heart failure hospitalization, mortality) and comparative safety in relation to device-related complications and re-interventions (e.g., lead dislodgement, infection) relative to standard of care biventricular pacing in patients with heart failure due to left ventricular systolic dysfunction (LVEF≤50%) and with either a wide QRS (≥130 ms) or with/anticipated \>40% pacing who are already receiving current standard heart failure pharmacological therapy.

Detailed Description

Dive into the extended narrative that explains the scientific background, objectives, and procedures in greater depth.

In this prospective, randomized, multi-center clinical trial, the investigators aim to prospectively evaluate the comparative effectiveness His or Left bundle branch pacing (His/LBBP) vs. biventricular pacing (BiVP) in patients with heart failure due to left ventricular systolic dysfunction (LVEF≤50%) and with either a wide QRS (≥130 ms) or with/anticipated \>40% pacing who are already receiving current standard heart failure pharmacological therapy by assessing all cause death and heart failure hospitalization at the end of the study.

Additional formal secondary objectives include evaluation disease-specific quality and psychological adjustment changes at 1 year after device implant and evaluation of a composite of death of any cause or heart failure hospitalization or more \>15% increase in the left ventricular end-systolic volume index at the end of the study.

Conditions

See the medical conditions and disease areas that this research is targeting or investigating.

Heart Failure Heart Failure With Reduced Ejection Fraction AV Block LBBB RBBB Intraventricular Conduction Delay Pacing-Induced Cardiomyopathy

Study Design

Understand how the trial is structured, including allocation methods, masking strategies, primary purpose, and other design elements.

Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

TRIPLE

Participants Caregivers Outcome Assessors

Study Groups

Review each arm or cohort in the study, along with the interventions and objectives associated with them.

His/Left Bundle Branch Pacing (His/LBBP)

Patients with LVEF≤35% at entry will receive a His/LBB defibrillator which includes implantation of three leads, an endocardial right atrial lead, an endocardial right ventricular ICD lead, and an endocardial His-bundle or left bundle branch pacing lead directly pacing the intrinsic conduction system.

Patients with LVEF 36-50% at entry will receive His/LBB pacemaker which includes implantation of two leads, an endocardial right atrial lead, and an endocardial His-bundle or left bundle branch pacing lead directly pacing the intrinsic conduction system.

Group Type ACTIVE_COMPARATOR

His/LBBP

Intervention Type DEVICE

Pacing at the level His-Bundle or left bundle branch is used to correct the underlying conduction abnormality, resulting in a faster and more homogeneous activation of the heart pacing directly via the intrinsic conduction system of the heart accompanied by a right atrial endocardial lead and a right ventricular defibrillator endocardial lead for LVEF≤35% and by a right atrial endocardial lead for LVEF 36-50%.

Biventricular Pacing (BiVP)

Patients with LVEF≤35% at entry will receive a BiV defibrillator which includes implantation of three leads, an endocardial right atrial lead, an endocardial right ventricular ICD lead, and and an epicardial left ventricular lead implanted in a branch of the coronary sinus.

Patients with LVEF 36-50% at entry will receive BiV pacemaker which includes implantation of three leads, an endocardial right atrial lead, an endocardial right ventricular pacing lead, and and an epicardial left ventricular lead implanted in a branch of the coronary sinus.

Group Type ACTIVE_COMPARATOR

BiVP

Intervention Type DEVICE

Biventricular pacing has been shown to improve outcomes by delivering synchronized electrical stimuli to the right and left ventricles utilizing an an endocardial right atrial lead, an endocardial right ventricular lead, and an epicardial left ventricular lead implanted in a branch of the coronary sinus.

For LVEF≤35% a biventricular pacemaker-defibrillator will be implanted while for LVEF 36-50% a biventricular pacemaker will be implanted.

Interventions

Learn about the drugs, procedures, or behavioral strategies being tested and how they are applied within this trial.

His/LBBP

Pacing at the level His-Bundle or left bundle branch is used to correct the underlying conduction abnormality, resulting in a faster and more homogeneous activation of the heart pacing directly via the intrinsic conduction system of the heart accompanied by a right atrial endocardial lead and a right ventricular defibrillator endocardial lead for LVEF≤35% and by a right atrial endocardial lead for LVEF 36-50%.

Intervention Type DEVICE

BiVP

Biventricular pacing has been shown to improve outcomes by delivering synchronized electrical stimuli to the right and left ventricles utilizing an an endocardial right atrial lead, an endocardial right ventricular lead, and an epicardial left ventricular lead implanted in a branch of the coronary sinus.

For LVEF≤35% a biventricular pacemaker-defibrillator will be implanted while for LVEF 36-50% a biventricular pacemaker will be implanted.

Intervention Type DEVICE

Eligibility Criteria

Check the participation requirements, including inclusion and exclusion rules, age limits, and whether healthy volunteers are accepted.

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.
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

Meet the organizations funding or collaborating on the study and learn about their roles.

Patient-Centered Outcomes Research Institute

OTHER

Sponsor Role collaborator

University of Utah

OTHER

Sponsor Role collaborator

Virginia Commonwealth University

OTHER

Sponsor Role collaborator

Cleveland Clinic Florida

OTHER

Sponsor Role collaborator

East Carolina University

OTHER

Sponsor Role collaborator

Baylor College of Medicine

OTHER

Sponsor Role lead

Responsible Party

Identify the individual or organization who holds primary responsibility for the study information submitted to regulators.

Mihail Gabriel Chelu

Associate Professor

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

Learn about the lead researchers overseeing the trial and their institutional affiliations.

Mihail G Chelu, MD, PhD

Role: PRINCIPAL_INVESTIGATOR

Baylor College of Medicine

Kenneth A Ellenbogen, MD

Role: PRINCIPAL_INVESTIGATOR

Virginia Commonwealth University

Locations

Explore where the study is taking place and check the recruitment status at each participating site.

Mercy Gilbert & Chandler Regional Medical Centers, Gilbert AZ

Gilbert, Arizona, United States

Site Status RECRUITING

University of Arizona College of Medicine- Phoenix

Tucson, Arizona, United States

Site Status RECRUITING

University of Arkansas for Medical Sciences (UAMS)

Little Rock, Arkansas, United States

Site Status RECRUITING

University of California San Diego

La Jolla, California, United States

Site Status RECRUITING

University of Colorado (Anschutz Medical Campus)

Denver, Colorado, United States

Site Status RECRUITING

South Denver Cardiology Associates

Littleton, Colorado, United States

Site Status RECRUITING

Hartford Hospital

Hartford, Connecticut, United States

Site Status RECRUITING

Yale University

New Haven, Connecticut, United States

Site Status RECRUITING

Heart Rhythm Solutions

Davie, Florida, United States

Site Status RECRUITING

University of Florida Jacksonville

Jacksonville, Florida, United States

Site Status NOT_YET_RECRUITING

Mount Sinai Medical Center of Florida, Inc.

Miami Beach, Florida, United States

Site Status NOT_YET_RECRUITING

Cleveland Clinic Florida

Palm Beach Gardens, Florida, United States

Site Status RECRUITING

Florida Heart and Vascular, LLC dba Florida Heart Rhythm Specialist, PLLC

South Pasadena, Florida, United States

Site Status NOT_YET_RECRUITING

University of South Florida

Tampa, Florida, United States

Site Status RECRUITING

Rush University

Chicago, Illinois, United States

Site Status RECRUITING

University of Chicago

Chicago, Illinois, United States

Site Status RECRUITING

Northwestern University

Evanston, Illinois, United States

Site Status RECRUITING

CIS Clinical Research Corporation

Naperville, Illinois, United States

Site Status ENROLLING_BY_INVITATION

Trustees of Indiana University

Indianapolis, Indiana, United States

Site Status RECRUITING

Baptist Health Louisville

Louisville, Kentucky, United States

Site Status RECRUITING

Massachusetts General Hospital

Boston, Massachusetts, United States

Site Status RECRUITING

Beth Israel Deaconess Medical Center

Boston, Massachusetts, United States

Site Status RECRUITING

Mayo Clinic

Rochester, Minnesota, United States

Site Status RECRUITING

HMH Hospitals Corporation

Hackensack, New Jersey, United States

Site Status RECRUITING

Virtua Health

Marlton, New Jersey, United States

Site Status RECRUITING

Newark Beth Israel Medical Center

Newark, New Jersey, United States

Site Status RECRUITING

The Valley Hospital, Inc.

Ridgewood, New Jersey, United States

Site Status RECRUITING

Lovelace Medical Center

Albuquerque, New Mexico, United States

Site Status RECRUITING

Weill Cornell Medicine

New York, New York, United States

Site Status RECRUITING

Icahn School of Medicine at Mount Sinai

New York, New York, United States

Site Status RECRUITING

Columbia University Medical Center/New York-Presbyterian Hospital (CUMC/NYPH)

New York, New York, United States

Site Status NOT_YET_RECRUITING

MH Mission Hospital LLLP- Asheville Cardiology Associates

Asheville, North Carolina, United States

Site Status RECRUITING

University of North Carolina

Chapel Hill, North Carolina, United States

Site Status RECRUITING

Novant Health

Charlotte, North Carolina, United States

Site Status RECRUITING

The Christ Hospital

Cincinnati, Ohio, United States

Site Status RECRUITING

The MetroHealth System

Cleveland, Ohio, United States

Site Status RECRUITING

Cleveland Clinic

Cleveland, Ohio, United States

Site Status RECRUITING

Oregon Health & Science University

Portland, Oregon, United States

Site Status RECRUITING

St. Luke's University Health Network

Allentown, Pennsylvania, United States

Site Status RECRUITING

Lehigh Valley Hospital Inc.

Allentown, Pennsylvania, United States

Site Status RECRUITING

Penn Medicine Lancaster General

Lancaster, Pennsylvania, United States

Site Status RECRUITING

University of Pennsylvania

Philadelphia, Pennsylvania, United States

Site Status RECRUITING

Thomas Jefferson University Hospital

Philadelphia, Pennsylvania, United States

Site Status RECRUITING

Allegheny-Singer Research Institute

Pittsburgh, Pennsylvania, United States

Site Status RECRUITING

University of Pittsburg

Pittsburgh, Pennsylvania, United States

Site Status RECRUITING

Geisinger Commonwealth School of Medicine

Scranton, Pennsylvania, United States

Site Status RECRUITING

Medical University of South Carolina (MUSC)

Charleston, South Carolina, United States

Site Status RECRUITING

Prisma Health-Upstate

Greenville, South Carolina, United States

Site Status NOT_YET_RECRUITING

Texas Health Research & Education Institute

Arlington, Texas, United States

Site Status NOT_YET_RECRUITING

Baylor College of Medicine

Houston, Texas, United States

Site Status RECRUITING

St. Mark's Hospital

Salt Lake City, Utah, United States

Site Status RECRUITING

University of Vermont

Burlington, Vermont, United States

Site Status RECRUITING

University of Virginia Health System

Charlottesville, Virginia, United States

Site Status RECRUITING

Inova Heart and Vascular Institute

Falls Church, Virginia, United States

Site Status RECRUITING

Sentara Healthcare

Newport News, Virginia, United States

Site Status RECRUITING

Virginia Commonwealth University

Richmond, Virginia, United States

Site Status RECRUITING

University of Washington

Seattle, Washington, United States

Site Status RECRUITING

Mazankowski Alberta Heart Institute/University of Alberta

Edmonton, Alberta, Canada

Site Status NOT_YET_RECRUITING

University of British Columbia

Vancouver, British Columbia, Canada

Site Status RECRUITING

Victoria Cardiac Arrhythmia Trials (VCAT) Inc.

Victoria, British Columbia, Canada

Site Status RECRUITING

Nova Scotia Health Authority

Halifax, Nova Scotia, Canada

Site Status RECRUITING

Hamilton Health Sciences (HHS)

Hamilton, Ontario, Canada

Site Status RECRUITING

Newmarket Electrophysiology Research Group Inc. (NERG)

Newmarket, Ontario, Canada

Site Status RECRUITING

University of Ottawa Heart Institute

Ottawa, Ontario, Canada

Site Status RECRUITING

Sunnybrook Research Institute

Toronto, Ontario, Canada

Site Status RECRUITING

Montreal Heart Institute

Montreal, Quebec, Canada

Site Status RECRUITING

CIUSSS de l'Estrie - CHUS

Saint-Jean-sur-Richelieu, Quebec, Canada

Site Status NOT_YET_RECRUITING

University of Calgary

Calgary, , Canada

Site Status RECRUITING

Waterloo Wellington Cardiovascular Research Institute (WWCRI) - St. Mary's General Hospital

Kitchener, , Canada

Site Status RECRUITING

Research Institute of the McGill University Health Centre (RI-MUHC) - MUHC, Montreal General Hospital

Montreal, , Canada

Site Status RECRUITING

Université Laval

Québec, , Canada

Site Status RECRUITING

Countries

Review the countries where the study has at least one active or historical site.

United States Canada

Central Contacts

Reach out to these primary contacts for questions about participation or study logistics.

Mihail G Chelu, MD, PhD

Role: CONTACT

7137987291

Merin Thomas

Role: CONTACT

7137987291

Facility Contacts

Find local site contact details for specific facilities participating in the trial.

Jacqueline Killian

Role: primary

(480) 406-7231

Raeven Maxwell

Role: primary

(312) 237-5891

Urvashi Kalola

Role: primary

0000000000

Jesus Gil

Role: primary

0000000000

Tanner Bloks

Role: primary

0000000000

Kathrin Siegel

Role: primary

(303) 703-2162

Saskia Campbell

Role: primary

(860) 972-1558

Meg Leiss

Role: primary

0000000000

Daniela Rodriguez

Role: primary

(954) 707-5200

Latonya Been

Role: primary

0000000000

Giselle Cortez

Role: primary

00000000000

Maria Gomez Mejia

Role: primary

(954) 659-6204

Adryanna Alban

Role: primary

0000000000

Jacky He

Role: primary

(813) 250-2462

Nusrat Jahan

Role: primary

Shahram Sarrafi

Role: primary

Katrina Martin

Role: primary

(312) 695-4067

Molly Stearns

Role: primary

(317) 962-1130

Karin Cryan

Role: primary

0000000000

Chris Azzam

Role: primary

0000000000

Henry Xie

Role: primary

(617) 632-8956

Axe M Ahmed

Role: primary

0000000000

Stephanie Lynes

Role: primary

(732) 897-2871

Marisa Brown

Role: primary

(856) 355-1226

Patricia Policastro

Role: primary

(973) 926-8451

Lauren Tedeschi

Role: primary

(201) 447-8453

Zinai Tellez

Role: primary

Penn Collins

Role: primary

(315) 481-7389

Ugur Gurol

Role: primary

(646) 581-1360

Alicha Daniel

Role: primary

0000000000

Olivia Lim

Role: primary

0000000000

Elias Wen

Role: primary

0000000000

Darren N Crawford

Role: primary

Susanne Pasley

Role: primary

0000000000

Pete Leo

Role: primary

(216) 778-2714

Raquel Rozich

Role: primary

0000000000

Liz Cannard

Role: primary

0000000000

Kyle McFadden

Role: primary

0000000000

Traci L Eichelberger

Role: primary

0000000000

Andrew Hershey

Role: primary

(717) 544-1412

Mary Gnap

Role: primary

(215) 349-8446

Mckenna Krall

Role: primary

Minesh Lathia

Role: primary

(412) 359-8468

Sherry Pellegrino

Role: primary

(412) 647-8210

Grace E Hughes

Role: primary

Olivia Washington

Role: primary

(843) 792-0464

Prisma Health-Upstate Shrum

Role: primary

0000000000

Rebecca Wade

Role: primary

0000000000

Stephen Harold

Role: primary

(713) 798-7227

Pragyna Gundaboina

Role: primary

0000000000

Sonja Baden

Role: primary

(802) 847-8833

Katie L Sullivan

Role: primary

Tracy Plummer

Role: primary

(703) 776-3567

Linette Klevan

Role: primary

Melissa Sears

Role: primary

Adele Stefanowicz

Role: primary

0000000000

Lee-Ann Langkaas

Role: primary

0000000000

Munyura Yannick

Role: primary

0000000000

Matthew Coxon

Role: primary

(250) 595-0400

Stephanie Hobbs

Role: primary

0000000000

Kiran Qamar

Role: primary

(905) 521-2100

Lynn Nyman

Role: primary

(905) 895-4521

Maitreya PATEL

Role: primary

0000000000

Ambreen Syeda

Role: primary

(416) 480-6100

François François

Role: primary

(514) 376-3330

Marie-Claude Grenier

Role: primary

0000000000

Nirav Bhagat

Role: primary

Mary Radyk

Role: primary

Fiorella Rafti

Role: primary

Marina Sanchez

Role: primary

(418) 656-8711

Other Identifiers

Review additional registry numbers or institutional identifiers associated with this trial.

PLACER 2021C3- 24160

Identifier Type: -

Identifier Source: org_study_id

More Related Trials

Additional clinical trials that may be relevant based on similarity analysis.