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Showing 1–24 of 145 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Cardiac Resynchronization Therapy Clear all
Completed Not applicable Interventional

Optimizing Left Ventricular Lead To Improve Cardiac Output

NCT01399801
View directory record Official record
Conditions
Ischemic Congestive Cardiomyopathy, Dilated Cardiomyopathy, Congestive Heart Failure
Interventions
Doppler flow measurement, standard implantation of the LV lead
Procedure
Lead sponsor
Ann Marie Chikowski
Other
Eligibility
Not listed
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Wynnewood, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 29, 2022 · Synced Jun 26, 2026, 2:56 AM EDT
Completed No phase listed Observational

CRT Pilot Study for Children With Heart Failure

NCT00585065
View directory record Official record
Conditions
Chronic Pediatric Heart Failure
Interventions
CRT device implant
Device
Lead sponsor
University of Utah
Other
Eligibility
1 Year to 18 Years
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2016
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated May 10, 2023 · Synced Jun 26, 2026, 2:56 AM EDT
Completed Phase 2 Interventional Results available

Evaluating Ventricular Arrhythmia in Subjects With Implantable Cardioverter Defibrillator or Cardiac Resynchronization Therapy-Defibrillator

NCT02104583
View directory record Official record
Conditions
Ventricular Arrhythmia
Interventions
Eleclazine, Placebo to match eleclazine
Drug
Lead sponsor
Gilead Sciences
Industry
Eligibility
18 Years to 80 Years
Enrollment
313 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
37
States / cities
Mesa, Arizona • Long Beach, California • Los Angeles, California + 32 more
Source: ClinicalTrials.gov public record
Updated Apr 8, 2019 · Synced Jun 26, 2026, 2:56 AM EDT
Terminated Phase 2Phase 3 Interventional Results available

Echocardiography Guided Cardiac Resynchronization Therapy (EchoCRT)

NCT00683696
View directory record Official record
Conditions
Heart Failure, Ventricular Dyssynchrony
Interventions
Implantable Cardioverter Defibrillator with Cardiac Resynchronization Therapy (BIOTRONIK Lumax HF-T CRT-D)
Device
Lead sponsor
Biotronik, Inc.
Industry
Eligibility
18 Years and older
Enrollment
1,680 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2013
U.S. locations
62
States / cities
Concord, California • Los Angeles, California • Rancho Mirage, California + 46 more
Source: ClinicalTrials.gov public record
Updated Jan 16, 2018 · Synced Jun 26, 2026, 2:56 AM EDT
Terminated Phase 4 Interventional

BOAT: Beta Blocker Uptitration With OptiVol After Cardiac Resynchronization Therapy (CRT)

NCT00433043
View directory record Official record
Conditions
Congestive Heart Failure
Interventions
Beta blocker (carvedilol or metoprolol succinate), CRT (cardiac resynchronization therapy)
Drug · Procedure
Lead sponsor
St. Luke's-Roosevelt Hospital Center
Other
Eligibility
18 Years to 99 Years
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
3
States / cities
New York, New York • Rochester, New York • Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 29, 2015 · Synced Jun 26, 2026, 2:56 AM EDT
Withdrawn Not applicable Interventional

Effects of CRT Optimization as Assessed by Cardiac MR

NCT04763460
View directory record Official record
Conditions
Heart Failure, Systolic
Interventions
Programming of CRT device settings
Device
Lead sponsor
Minneapolis Heart Institute Foundation
Other
Eligibility
18 Years to 100 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
2
States / cities
Minneapolis, Minnesota • Saint Paul, Minnesota
Source: ClinicalTrials.gov public record
Updated Mar 3, 2026 · Synced Jun 26, 2026, 2:56 AM EDT
Terminated Phase 4 Interventional

MAGNET CRT Feasibility - Efficiency of LV Lead Placement Comparing Conventional vs. Magnetic Guidance

NCT00370474
View directory record Official record
Conditions
Cardiac Resynchronization Therapy
Interventions
Bi-ventricular lead placement
Device
Lead sponsor
Stereotaxis
Industry
Eligibility
18 Years and older
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006
U.S. locations
6
States / cities
Gainesville, Georgia • Lexington, Kentucky • Boston, Massachusetts + 3 more
Source: ClinicalTrials.gov public record
Updated Jun 17, 2007 · Synced Jun 26, 2026, 2:56 AM EDT
Completed Not applicable Interventional Results available

Promote Q Cardiac Resynchronization Therapy Defibrillator (CRT-D) and Quartet Left Ventricular Heart Lead Study

NCT00990665
View directory record Official record
Conditions
Heart Failure
Interventions
CRT-D and LV lead (Quartet™ lead and Promote Q® device system)
Device
Lead sponsor
Abbott Medical Devices
Industry
Eligibility
18 Years and older
Enrollment
178 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
24
States / cities
Birmingham, Alabama • Little Rock, Arkansas • Glendale, California + 20 more
Source: ClinicalTrials.gov public record
Updated Feb 26, 2019 · Synced Jun 26, 2026, 2:56 AM EDT
Completed Not applicable Interventional Results available

Evaluation of ACUITY™ X4 Quadripolar Coronary Venous Leads and RELIANCE™ 4-FRONT Defibrillation Leads

NCT02071173
View directory record Official record
Conditions
Cardiac Resynchronization Therapy
Interventions
ACUITY X4 quadripolar coronary venous lead and RELIANCE 4-FRONT defibrillation lead
Device
Lead sponsor
Boston Scientific Corporation
Industry
Eligibility
18 Years and older
Enrollment
2,244 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2020
U.S. locations
96
States / cities
Birmingham, Alabama • Huntsville, Alabama • Anchorage, Alaska + 85 more
Source: ClinicalTrials.gov public record
Updated Jan 6, 2021 · Synced Jun 26, 2026, 2:56 AM EDT
Completed Not applicable Interventional Results available

Remote Device Interrogation In The Emergency Department

NCT01871090
View directory record Official record
Conditions
Heart Disease, Cardiovascular Disease, Heart Failure, Arrhythmias, Cardiac
Interventions
Unpaired remote monitoring transmitter
Device
Lead sponsor
Abbott Medical Devices
Industry
Eligibility
18 Years and older
Enrollment
99 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
Zanesville, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 14, 2019 · Synced Jun 26, 2026, 2:56 AM EDT
Terminated Not applicable Interventional Results available

Effect of Posture on Left Ventricular (LV) Transvenous Lead Capture Thresholds (EXPECT)

NCT01520714
View directory record Official record
Conditions
Congestive Heart Failure
Interventions
Medtronic 4195 active fixation LV lead and Medtronic passive fixation LV lead
Device
Lead sponsor
Baylor Research Institute
Other
Eligibility
18 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Plano, Texas
Source: ClinicalTrials.gov public record
Updated May 25, 2014 · Synced Jun 26, 2026, 2:56 AM EDT
Completed No phase listed Observational

Predicting Response to Cardiac Resynchronization Therapy in Heart Failure

NCT00359372
View directory record Official record
Conditions
Heart Failure, Left Ventricular Dysfunction
Interventions
Not listed
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
18 Years and older
Enrollment
180 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
3
States / cities
Baltimore, Maryland • Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Jun 26, 2026, 2:56 AM EDT
Completed Not applicable Interventional

Improvement in Clinical Outcomes in Heart Failure Patients With ICDs That Practice Meditation

NCT00611260
View directory record Official record
Conditions
Congestive Heart Failure, Cardiac Resynchronization Therapy
Interventions
Vipassana Meditation practice and instruction, Standard Medical Care
Behavioral · Other
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years to 85 Years
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2012
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated May 29, 2017 · Synced Jun 26, 2026, 2:56 AM EDT
Completed No phase listed Observational Results available

QuickFlex Micro Left Ventricular Lead Post Approval Study

NCT01179477
View directory record Official record
Conditions
Heart Failure
Interventions
Implantation of a QuickFlex® μ Model 1258T LV Lead
Device
Lead sponsor
Abbott Medical Devices
Industry
Eligibility
18 Years and older
Enrollment
1,930 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2017
U.S. locations
77
States / cities
Birmingham, Alabama • Huntsville, Alabama • Anchorage, Alaska + 67 more
Source: ClinicalTrials.gov public record
Updated Aug 11, 2019 · Synced Jun 26, 2026, 2:56 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 Jun 26, 2026, 2:56 AM EDT
Completed Not applicable Interventional Results available

Attain Model 4196 Left Ventricular (LV) Lead

NCT00271544
View directory record Official record
Conditions
Heart Failure
Interventions
Pacing Lead
Device
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
18 Years and older
Enrollment
190 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
19
States / cities
Anchorage, Alaska • Phoenix, Arizona • Long Beach, California + 16 more
Source: ClinicalTrials.gov public record
Updated Sep 27, 2009 · Synced Jun 26, 2026, 2:56 AM EDT
Completed No phase listed Observational Results available

SJ4 Post Approval Study in Implantable Cardioverter-Defibrillator and Cardiac Resynchronization Therapy Defibrillator Patients

NCT00940888
View directory record Official record
Conditions
Tachyarrhythmias, Sudden Cardiac Death, Heart Failure
Interventions
SJ4 connector and RV high voltage SJ4 lead
Device
Lead sponsor
Abbott Medical Devices
Industry
Eligibility
18 Years and older
Enrollment
1,701 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2015
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 3, 2019 · Synced Jun 26, 2026, 2:56 AM EDT
Completed Not applicable Interventional Results available

Attain Performa(TM) Quadripolar Lead Study

NCT01751022
View directory record Official record
Conditions
Heart Failure
Interventions
Device: Attain Performa Pacing Lead (along with a standard CRT-D system)
Device
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
18 Years and older
Enrollment
1,202 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
67
States / cities
Glendale, California • Riverside, California • San Diego, California + 64 more
Source: ClinicalTrials.gov public record
Updated Dec 4, 2016 · Synced Jun 26, 2026, 2:56 AM EDT
Terminated Not applicable Interventional

Optimizing CRT With ECGI

NCT03492788
View directory record Official record
Conditions
Heart Failure, Systolic, Left Bundle-Branch Block
Interventions
ECGI-optimized VV-offset, Zero VV-offset
Other
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 100 Years
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Apr 30, 2019 · Synced Jun 26, 2026, 2:56 AM EDT
Completed Not applicable Interventional Results available

Adaptive Cardiac Resynchronization Therapy Study

NCT00980057
View directory record Official record
Conditions
Heart Failure
Interventions
Adaptive CRT (aCRT), Echo
Device
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
18 Years and older
Enrollment
522 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
55
States / cities
Huntsville, Alabama • Anchorage, Alaska • Phoenix, Arizona + 52 more
Source: ClinicalTrials.gov public record
Updated Oct 15, 2018 · Synced Jun 26, 2026, 2:56 AM EDT
Not listed Not applicable Interventional

Multi-lead ECG to Effectively Optimize Resynchronization Devices: New CRT Recipients

NCT04083690
View directory record Official record
Conditions
Heart Failure, Systolic
Interventions
Reprogramming of CRT Device Settings to Optimal Electrical Synchrony
Device
Lead sponsor
Allina Health System
Other
Eligibility
18 Years to 100 Years
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2024
U.S. locations
2
States / cities
Minneapolis, Minnesota • Saint Paul, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 8, 2022 · Synced Jun 26, 2026, 2:56 AM EDT
Recruiting Not applicable Interventional

AI-Guided Left Bundle Branch Area Pacing

NCT07206602
View directory record Official record
Conditions
Heart Failure
Interventions
AI-assisted Left Bundle Branch Area Pacing, Left Bundle Branch Area Pacing
Device · Procedure
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
224 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Feb 17, 2026 · Synced Jun 26, 2026, 2:56 AM EDT
Completed No phase listed Observational Results available

MultiPoint Pacing™ Post Market Study

NCT02832622
View directory record Official record
Conditions
Heart Failure
Interventions
MPP, BiV/MPP
Device
Lead sponsor
Abbott Medical Devices
Industry
Eligibility
18 Years and older
Enrollment
2,169 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
110
States / cities
Birmingham, Alabama • Huntsville, Alabama • Avondale, Arizona + 99 more
Source: ClinicalTrials.gov public record
Updated Feb 16, 2021 · Synced Jun 26, 2026, 2:56 AM EDT
Completed Not applicable Interventional Results available

Attain Stability™ Quad Clinical Study

NCT03099655
View directory record Official record
Conditions
Heart Failure
Interventions
Attain Stability Quad Left Ventricular Pacing Lead
Device
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
18 Years and older
Enrollment
471 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
35
States / cities
Phoenix, Arizona • East Palo Alto, California • Torrance, California + 30 more
Source: ClinicalTrials.gov public record
Updated Jan 8, 2020 · Synced Jun 26, 2026, 2:56 AM EDT