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ClinicalTrials.gov public records Last synced Jul 21, 2026, 11:37 AM EDT

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Showing 1–24 of 25 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Bundle-Branch Block Clear all
Recruiting Not applicable Interventional

Left vs Left Randomized Clinical Trial

NCT05650658
View directory record Official record
Conditions
Heart Failure, Heart Failure With Reduced Ejection Fraction, AV Block, LBBB, RBBB, Intraventricular Conduction Delay, Pacing-Induced Cardiomyopathy
Interventions
His/LBBP, BiVP
Device
Lead sponsor
Baylor College of Medicine
Other
Eligibility
18 Years and older
Enrollment
2,136 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2029
U.S. locations
57
States / cities
Gilbert, Arizona • Tucson, Arizona • Little Rock, Arkansas + 46 more
Source: ClinicalTrials.gov public record
Updated Oct 1, 2025 · Synced Jul 21, 2026, 11:37 AM EDT
Completed No phase listed Observational

Pacemaker Utilization and Ventricular Pacing in Patients Undergoing Trans-catheter Aortic Valve Replacement (TAVR)

NCT02994667
View directory record Official record
Conditions
Ventricular Flutter, Atrioventricular Block, Intraventricular Conduction Delay, Bundle Branch Block, Pacemaker Implantation
Interventions
Permanent Pacemaker Placement
Device
Lead sponsor
Baylor Research Institute
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
1
States / cities
Plano, Texas
Source: ClinicalTrials.gov public record
Updated Jan 21, 2020 · Synced Jul 21, 2026, 11:37 AM EDT
Terminated No phase listed Observational

Activation Timing and Atrial Fibrillation

NCT02063191
View directory record Official record
Conditions
Arrhythmias, Cardiac, Atrial Fibrillation, Bundle Branch Block
Interventions
Not listed
Lead sponsor
Essentia Health
Other
Eligibility
18 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014
U.S. locations
1
States / cities
Duluth, Minnesota
Source: ClinicalTrials.gov public record
Updated Nov 3, 2014 · Synced Jul 21, 2026, 11:37 AM EDT
Completed Not applicable Interventional

Mapping and Pacing of the His Bundle for Heart Failure Patients With Left Bundle Branch Block

NCT03803995
View directory record Official record
Conditions
Heart Failure, Left Bundle-Branch Block
Interventions
Mapping and Pacing the His Bundle, Placing a guidewire in Coronary sinus for measurement of Q-LV during His Bundle pacing or, if needed, for LV pacing
Procedure
Lead sponsor
Abbott Medical Devices
Industry
Eligibility
18 Years and older
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2024
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Oct 1, 2025 · Synced Jul 21, 2026, 11:37 AM EDT
Recruiting Not applicable Interventional

His-Bundle Corrective Pacing in Heart Failure

NCT05265520
View directory record Official record
Conditions
Right Bundle-Branch Block, Heart Failure, His-bundle Pacing, Cardiac Resynchronization Therapy
Interventions
His-CRT implantation, BIV-CRT implantation
Procedure
Lead sponsor
University of Rochester
Other
Eligibility
18 Years and older
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2028
U.S. locations
14
States / cities
Phoenix, Arizona • Los Angeles, California • Tampa, Florida + 8 more
Source: ClinicalTrials.gov public record
Updated Feb 8, 2026 · Synced Jul 21, 2026, 11:37 AM EDT
Completed Not applicable Interventional Results available

AdaptResponse Clinical Trial

NCT02205359
View directory record Official record
Conditions
Heart Failure With Left Bundle Branch Block
Interventions
aCRT ON, aCRT OFF
Device
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
18 Years and older
Enrollment
3,797 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2022
U.S. locations
90
States / cities
Mesa, Arizona • Phoenix, Arizona • Little Rock, Arkansas + 76 more
Source: ClinicalTrials.gov public record
Updated Nov 28, 2023 · Synced Jul 21, 2026, 11:37 AM EDT
Active, not recruiting Not applicable Interventional

REsynchronization Comparison In LBBB and Normal or Mildly Reduced VENTricular Function With CRT (REINVENT-CRT)

NCT05652218
View directory record Official record
Conditions
Left Ventricular Ejection Fraction, Heart Failure (HF), Left Bundle-Branch Block
Interventions
LB-CRT, BIV-CRT
Device
Lead sponsor
Inova Health Care Services
Other
Eligibility
Not listed
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
2
States / cities
Durham, North Carolina • Falls Church, Virginia
Source: ClinicalTrials.gov public record
Updated May 5, 2026 · Synced Jul 21, 2026, 11:37 AM EDT
Terminated Not applicable Interventional Results available

Left Bundle Area Versus Selective His Bundle Pacing

NCT04093414
View directory record Official record
Conditions
Bradycardia, Sinus Node Dysfunction, Atrioventricular Block
Interventions
Select Secure pacing lead
Device
Lead sponsor
David Haines, MD
Other
Eligibility
19 Years and older
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
2
States / cities
Royal Oak, Michigan • Troy, Michigan
Source: ClinicalTrials.gov public record
Updated Aug 16, 2022 · Synced Jul 21, 2026, 11:37 AM EDT
Terminated Not applicable Interventional Results available

Right Ventricular Septal Pacing in Patients With Right Bundle Branch Block and Heart Failure (The SPARK Trial)

NCT02441101
View directory record Official record
Conditions
Right Bundle-Branch Block, Heart Failure
Interventions
RV DDD(R)-60 with AV optimization, RV DDD(R)-60
Device
Lead sponsor
Barry London
Other
Eligibility
18 Years and older
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2020
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Jun 17, 2024 · Synced Jul 21, 2026, 11:37 AM EDT
Completed Not applicable Interventional Results available

CRT Implant Strategy Using the Longest Electrical Delay for Non-left Bundle Branch Block Patients

NCT01983293
View directory record Official record
Conditions
Non-left Bundle Branch Block, Ischemic or Non-ischemic Cardiomyopathy
Interventions
QLV based implant strategy, Standard of care implant strategy
Device
Lead sponsor
Abbott Medical Devices
Industry
Eligibility
18 Years and older
Enrollment
248 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2018
U.S. locations
32
States / cities
Glendale, California • Los Angeles, California • Mission Viejo, California + 25 more
Source: ClinicalTrials.gov public record
Updated Mar 12, 2019 · Synced Jul 21, 2026, 11:37 AM EDT
Recruiting Not applicable Interventional

Functional Outcomes in CondUction System Pacing and Right Ventricular Synchrony (FOCUS-Right)

NCT06601322
View directory record Official record
Conditions
Left Branch Bundle Block, RV - Right Ventricular Abnormality
Interventions
Pacemaker Interrogation and Electrocardiogram (ECG):, Cardiopulmonary Exercise Test (CPET) and Exercise Stress Cardiac Magnetic Resonance (ExeCMR, Continuous pacemaker telemetry (CPT)
Other
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Jun 16, 2026 · Synced Jul 21, 2026, 11:37 AM EDT
Terminated No phase listed Observational

SHERLOCK 3CG™ Diamond Tip Confirmation System

NCT03288766
View directory record Official record
Conditions
Indication for Peripheral Intravenous Catheterization, Atrial Flutter, Premature Atrial Contraction, Premature Ventricular Contraction, Premature Junctional Contraction, Tachycardia, Atrioventricular Block, Bundle-Branch Block
Interventions
PICC placement with SHERLOCK 3CG™ Diamond TCS with MODUS II software
Procedure
Lead sponsor
C. R. Bard
Industry
Eligibility
21 Years and older
Enrollment
232 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
6
States / cities
Las Vegas, Nevada • Greensboro, North Carolina • Greenville, North Carolina + 3 more
Source: ClinicalTrials.gov public record
Updated Oct 19, 2021 · Synced Jul 21, 2026, 11:37 AM EDT
Recruiting No phase listed Observational

Left Bundle Branch Area Mapping for Conduction System Pacing

NCT05884359
View directory record Official record
Conditions
Left Bundle-Branch Block, Pacemaker DDD
Interventions
3D Electroanatomical Mapping (NavX)
Diagnostic Test
Lead sponsor
Steward St. Elizabeth's Medical Center of Boston, Inc.
Other
Eligibility
18 Years to 88 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2028
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 20, 2026 · Synced Jul 21, 2026, 11:37 AM EDT
Terminated Not applicable Interventional

Adaptive Cardiac Resynchronization Therapy in Patients With RBBB

NCT05936294
View directory record Official record
Conditions
Right Bundle-Branch Block
Interventions
Optimization of CRT Device
Diagnostic Test
Lead sponsor
Henry Ford Health System
Other
Eligibility
18 Years to 89 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
2
States / cities
Little Rock, Arkansas • Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Jul 6, 2023 · Synced Jul 21, 2026, 11:37 AM EDT
Completed Not applicable Interventional Results available

BIOTRONIK Conduction System Pacing With the Solia Lead

NCT05251363
View directory record Official record
Conditions
Bradycardia, Atrioventricular Block, Left Bundle-Branch Block, Cardiomyopathies
Interventions
Solia S lead
Device
Lead sponsor
Biotronik, Inc.
Industry
Eligibility
18 Years and older
Enrollment
194 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
14
States / cities
Phoenix, Arizona • Ventura, California • Washington D.C., District of Columbia + 9 more
Source: ClinicalTrials.gov public record
Updated Mar 17, 2025 · Synced Jul 21, 2026, 11:37 AM EDT
Terminated Not applicable Interventional Results available

Pacing Affects Cardiovascular Endpoints in Patients With Right Bundle-Branch Block (The PACE-RBBB Trial)

NCT01169493
View directory record Official record
Conditions
Heart Failure, Right Bundle-Branch Block
Interventions
VVI-40, RV DDD-40, BiV DDD-40
Device
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
2
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 22, 2016 · Synced Jul 21, 2026, 11:37 AM EDT
Terminated Not applicable Interventional

Implementation of a Protocol Utilizing Adaptive CRT in a Normal AV Conduction, CRT Non-Response Population at Generator Replacement

NCT03305393
View directory record Official record
Conditions
Heart Failure
Interventions
Adaptiv CRT
Device
Lead sponsor
Stern Cardiovascular Foundation, Inc.
Industry
Eligibility
18 Years and older
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Germantown, Tennessee
Source: ClinicalTrials.gov public record
Updated Sep 18, 2019 · Synced Jul 21, 2026, 11:37 AM EDT
Completed Not applicable Interventional Results available

Adaptive CRT Effect on Electrical Dyssynchrony

NCT02543281
View directory record Official record
Conditions
Cardiomyopathy, Heart Failure, Left Bundle Branch Block
Interventions
Adaptive cardiac resynchronization therapy, Conventional Cardiac Resynchronization Therapy
Device
Lead sponsor
Larisa Tereshchenko
Other
Eligibility
18 Years and older
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2021
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Mar 19, 2025 · Synced Jul 21, 2026, 11:37 AM EDT
Completed Not applicable Interventional

Optimal Coronary Sinus Lead Implantation Using Intracardiac Impedography and Magnetic Resonance Imaging

NCT01129635
View directory record Official record
Conditions
Heart Failure, Systolic, Left Bundle Branch Block
Interventions
Cardiac Resynchronization Therapy (CRT) implantation
Procedure
Lead sponsor
Emory University
Other
Eligibility
Not listed
Enrollment
38 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jan 20, 2015 · Synced Jul 21, 2026, 11:37 AM EDT
Completed No phase listed Observational Results available

LBBAP Data Collection Registry

NCT05887323
View directory record Official record
Conditions
Bradycardia, Sinus Node Dysfunction, Heart Block, Syncope, Cardiomyopathies, Heart Failure
Interventions
Implantation of the Tendril 2088 lead in the LBBA
Device
Lead sponsor
Abbott Medical Devices
Industry
Eligibility
18 Years and older
Enrollment
221 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023
U.S. locations
5
States / cities
Jonesboro, Arkansas • Rancho Mirage, California • Pensacola, Florida + 2 more
Source: ClinicalTrials.gov public record
Updated Oct 7, 2024 · Synced Jul 21, 2026, 11:37 AM EDT
Active, not recruiting No phase listed Observational

Factors Associated With Response to Cardiac Resynchronization Therapy in Heart Failure Patients With Non-LBBB ECG Pattern

NCT06977217
View directory record Official record
Conditions
Cardiomyopathies, Heart Failure, Non-left Bundle Branch Block, Cardiac Resynchronization Therapy
Interventions
CRT-D implantation
Procedure
Lead sponsor
University of Rochester
Other
Eligibility
18 Years and older
Enrollment
270 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Jun 2, 2026 · Synced Jul 21, 2026, 11:37 AM EDT
Recruiting Not applicable Interventional

Cardiac Resynchronization Therapy Delivery Guided Non-Invasive Electrical and Venous Anatomy Assessment

NCT05327062
View directory record Official record
Conditions
Cardiac Resynchronization Therapy, Chronic Heart Failure, Left Bundle-Branch Block
Interventions
CRT implantation guided by XSpline, a non-invasive electrical and venous anatomy assessment
Device
Lead sponsor
XSpline S.p.A.
Industry
Eligibility
18 Years and older
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
4
States / cities
Chicago, Illinois • Boston, Massachusetts • Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 23, 2024 · Synced Jul 21, 2026, 11:37 AM EDT
Terminated Not applicable Interventional Results available

MIRACLE EF Clinical Study

NCT01735916
View directory record Official record
Conditions
Congestive Heart Failure, Left Bundle Branch Block, Systolic Heart Failure
Interventions
CRT-P Implant, CRT-P OFF
Device
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
18 Years and older
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
69
States / cities
Concord, California • La Jolla, California • Los Angeles, California + 62 more
Source: ClinicalTrials.gov public record
Updated Nov 5, 2017 · Synced Jul 21, 2026, 11:37 AM EDT
Active, not recruiting Not applicable Interventional

Comparison of Left Bundle Branch Area Versus Right Ventricular Septal Pacing in Patients With High-degree Conduction Disease After Transcatheter Aortic Valve Replacement (Left Bundle BRAVE)

NCT05541679
View directory record Official record
Conditions
Complete Heart Block, High Degree Second Degree Atrioventricular Block, Pacemaker-Induced Cardiomyopathy, Aortic Valve Stenosis
Interventions
Right ventricular septal pacing followed by left bundle branch area pacing, Left bundle branch area pacing followed by right ventricular septal pacing
Device
Lead sponsor
Main Line Health
Other
Eligibility
18 Years and older
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
4
States / cities
Overland Park, Kansas • Ridgewood, New Jersey • Philadelphia, Pennsylvania + 1 more
Source: ClinicalTrials.gov public record
Updated Dec 9, 2024 · Synced Jul 21, 2026, 11:37 AM EDT