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Study identifier: NCT05650658 Synced from ClinicalTrials.gov · July 28, 2026
● Recruiting

Left vs Left Randomized Clinical Trial

Condition: Heart Failure · Heart Failure With Reduced Ejection Fraction · AV Block  ·  Sponsor: Baylor College of Medicine

PhaseNA
Planned participants2136
Who can joinAll sexes, 18 Years to no upper limit
Healthy volunteersNo

About this study

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.

This description comes directly from the study's public registry record.

Talk to the study team

Mihail G Chelu, MD, PhD  ·  7137987291  ·  leftvsleft@bcm.edu

Merin Thomas  ·  7137987291  ·  merin.thomas@bcm.edu

Always discuss trial participation with your own doctor first.

Locations (71)

Mercy Gilbert & Chandler Regional Medical Centers, Gilbert AZGilbert, Arizona, United StatesRecruiting
University of Arizona College of Medicine- PhoenixTucson, Arizona, United StatesRecruiting
University of Arkansas for Medical Sciences (UAMS)Little Rock, Arkansas, United StatesRecruiting
University of California San DiegoLa Jolla, California, United StatesRecruiting
University of Colorado (Anschutz Medical Campus)Denver, Colorado, United StatesRecruiting
South Denver Cardiology AssociatesLittleton, Colorado, United StatesRecruiting
Hartford HospitalHartford, Connecticut, United StatesRecruiting
Yale UniversityNew Haven, Connecticut, United StatesRecruiting
Heart Rhythm SolutionsDavie, Florida, United StatesRecruiting
University of Florida JacksonvilleJacksonville, Florida, United StatesNot Yet Recruiting
Mount Sinai Medical Center of Florida, Inc.Miami Beach, Florida, United StatesNot Yet Recruiting
Cleveland Clinic FloridaPalm Beach Gardens, Florida, United StatesRecruiting

+ 59 more locations — full list on the registry record.

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Source record: clinicaltrials.gov/study/NCT05650658