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ClinicalTrials.gov public records Last synced Oct 23, 2026, 1:15 AM EDT

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Showing 1–24 of 75 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Pacemaker therapy Clear all
Completed No phase listed Observational Accepts healthy volunteers

Prospective Observation of Exercise Parameters in Advanced Heart Failure

NCT01210573
View directory record Official record
Conditions
Advanced Heart Failure
Interventions
adjustment of LVAD or pacemaker
Device
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2014
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Dec 18, 2014 · Synced Oct 23, 2026, 1:15 AM EDT
Completed Not applicable Interventional Results available

Cardiac Resynchronization in the Elderly

NCT03031847
View directory record Official record
Conditions
Heart Failure
Interventions
Cardiac Resynchronization Therapy Pacemaker, Cardiac Resynchronization Therapy Defibrillator
Device
Lead sponsor
Samir Saba
Other
Eligibility
75 Years and older
Enrollment
102 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
6
States / cities
Durham, North Carolina • Columbus, Ohio • Erie, Pennsylvania + 2 more
Source: ClinicalTrials.gov public record
Updated Dec 7, 2023 · Synced Oct 23, 2026, 1:15 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 3, 2026 · Synced Oct 23, 2026, 1:15 AM EDT
Terminated Not applicable Interventional

Effect of Cardiac Resynchronization Therapy (CRT) on Left Ventricular Assist Device (LVAD) Function

NCT04153786
View directory record Official record
Conditions
LVAD (Left Ventricular Assist Device) Driveline Infection
Interventions
Temporary changes in an already-implanted medical device (biventricular pacemaker)
Other
Lead sponsor
University of California, Davis
Other
Eligibility
Not listed
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2023
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Nov 7, 2024 · Synced Oct 23, 2026, 1:15 AM EDT
Completed No phase listed Observational

iBeat Wristwatch Validation Study

NCT03711695
View directory record Official record
Conditions
Arrythmia, Cardiac
Interventions
iBeat wristwatch device
Device
Lead sponsor
University of California, San Francisco
Other
Eligibility
21 Years to 85 Years
Enrollment
55 participants
Timeline
2018
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Mar 5, 2019 · Synced Oct 23, 2026, 1:15 AM EDT
Completed Not applicable Interventional Results available

Deep Brain Stimulation for the Treatment of Traumatic Brain Injury

NCT02881151
View directory record Official record
Conditions
TBI (Traumatic Brain Injury)
Interventions
Deep brain stimulation
Device
Lead sponsor
Jaimie M. Henderson
Other
Eligibility
22 Years to 60 Years
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Dec 23, 2022 · Synced Oct 23, 2026, 1:15 AM EDT
Completed Not applicable Interventional

Study for Atrial Fibrillation Reduction (SAFARI)

NCT00267137
View directory record Official record
Conditions
Atrial Fibrillation, Bradycardia
Interventions
Pacing Algorithms
Device
Lead sponsor
Medtronic Cardiac Ablation Solutions
Industry
Eligibility
Not listed
Enrollment
540 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2006
U.S. locations
34
States / cities
Yuma, Arizona • Fayetteville, Arkansas • Fort Smith, Arkansas + 31 more
Source: ClinicalTrials.gov public record
Updated Feb 13, 2025 · Synced Oct 23, 2026, 1:15 AM EDT
Completed Not applicable Interventional Results available

His Bundle Pacing Versus Coronary Sinus Pacing for Cardiac Resynchronization Therapy

NCT02700425
View directory record Official record
Conditions
Congestive Heart Failure
Interventions
CRT Pacemaker
Device
Lead sponsor
University of Chicago
Other
Eligibility
18 Years and older
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2020
U.S. locations
8
States / cities
Los Angeles, California • Chicago, Illinois • Naperville, Illinois + 3 more
Source: ClinicalTrials.gov public record
Updated Sep 5, 2021 · Synced Oct 23, 2026, 1:15 AM EDT
Completed No phase listed Observational

Ensure Cardiac Resynchronization Therapy Study

NCT00291564
View directory record Official record
Conditions
Heart Failure
Interventions
Cardiac Resynchronization Therapy Device
Device
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
18 Years and older
Enrollment
430 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2006
U.S. locations
32
States / cities
Birmingham, Alabama • Newport Beach, California • Trumbull, Connecticut + 29 more
Source: ClinicalTrials.gov public record
Updated Dec 21, 2007 · Synced Oct 23, 2026, 1:15 AM EDT
Completed No phase listed Observational

HBP Device EGM Data Collection

NCT03564860
View directory record Official record
Conditions
Sick Sinus Syndrome, AV Block, Heart Failure
Interventions
Device data collection
Procedure
Lead sponsor
Abbott Medical Devices
Industry
Eligibility
18 Years and older
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
3
States / cities
Huntsville, Alabama • Sayre, Pennsylvania • Greenville, South Carolina
Source: ClinicalTrials.gov public record
Updated Oct 8, 2020 · Synced Oct 23, 2026, 1:15 AM EDT
Completed Not applicable Interventional Results available

Multi-Channel Gastric Electrical Stimulation for the Treatment of Gastroparesis

NCT00595621
View directory record Official record
Conditions
Gastric Stasis
Interventions
Enterra Multi-Channel Phased Gastric Pacemaker (MGP-1)
Device
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
18 Years to 70 Years
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2009
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated May 31, 2019 · Synced Oct 23, 2026, 1:15 AM EDT
Completed No phase listed Observational

InSync Implantable Cardioverter Defibrillator Registry: Cardiac Resynchronization Therapy

NCT00289302
View directory record Official record
Conditions
Heart Failure, Cardiomyopathy
Interventions
Cardiac resynchronization therapy device
Device
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
18 Years and older
Enrollment
600 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2006
U.S. locations
51
States / cities
Birmingham, Alabama • Mobile, Alabama • Phoenix, Arizona + 48 more
Source: ClinicalTrials.gov public record
Updated Oct 5, 2007 · Synced Oct 23, 2026, 1:15 AM EDT
Completed No phase listed Observational Results available

ProMRI Study of the Entovis Pacemaker System (Phase B)

NCT02009696
View directory record Official record
Conditions
Magnetic Resonance Imaging (MRI); Cardiac Pacing
Interventions
Patients with a ProMRI Pacemaker System, Magnetic Resonance Imaging (MRI) scan
Device · Other
Lead sponsor
Biotronik, Inc.
Industry
Eligibility
18 Years and older
Enrollment
221 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
32
States / cities
Phoenix, Arizona • Scottsdale, Arizona • Concord, California + 28 more
Source: ClinicalTrials.gov public record
Updated Nov 25, 2015 · Synced Oct 23, 2026, 1:15 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

MANAGE-VT Registry - MANAGEment of Ventricular Tachycardia Outcomes Registry

NCT06455488
View directory record Official record
Conditions
Ventricular Tachycardia
Interventions
Ventricular Tachycardia Ablation, ICD Implant, Antiarrhythmic drug, EKG, Cardioversion, Echocardiogram
Procedure · Device · Drug + 1 more
Lead sponsor
CorVita Science Foundation
Other
Eligibility
18 Years and older
Enrollment
130 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2030
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 12, 2024 · Synced Oct 23, 2026, 1:15 AM EDT
Completed No phase listed Observational Results available

PARTNERS HF: Program to Access and Review Trending Information and Evaluate Correlation to Symptoms in Patients With Heart Failure

NCT00279955
View directory record Official record
Conditions
Heart Failure, Congestive
Interventions
Cardiac Resynchronization Therapy Device
Device
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
18 Years and older
Enrollment
1,024 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2008
U.S. locations
93
States / cities
Huntsville, Alabama • Phoenix, Arizona • Scottsdale, Arizona + 90 more
Source: ClinicalTrials.gov public record
Updated Jun 15, 2012 · Synced Oct 23, 2026, 1:15 AM EDT
Terminated Not applicable Interventional

Vascular Endothelial Function and Cardiac Resynchronization Response in Patients With Heart Failure

NCT02783716
View directory record Official record
Conditions
Heart Failure
Interventions
Subcutaneous adipose tissue collection, Peripheral arterial tonometry (PAT)
Procedure · Diagnostic Test
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2021
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jan 18, 2023 · Synced Oct 23, 2026, 1:15 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 6, 2017 · Synced Oct 23, 2026, 1:15 AM EDT
Completed Phase 1 Interventional

Natural History and Results of Dual Chamber (DDD) Pacemaker Therapy of Children With Obstructive Hypertrophic Cardiomyop...

NCT00001396
View directory record Official record
Conditions
Hypertrophic Cardiomyopathy
Interventions
Paragon Pacemaker
Device
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
5 Years to 20 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1993 – 2008
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 2, 2017 · Synced Oct 23, 2026, 1:15 AM EDT
Terminated Phase 3 Interventional Results available

AV Node Ablation and Pacemaker Therapy Compared to Drug Therapy for Atrial Fibrillation - Pilot Study

NCT00589303
View directory record Official record
Conditions
Atrial Fibrillation, Heart Failure
Interventions
FDA approved rate and rhythm control drugs, AV Node ablation and device implant
Drug · Device
Lead sponsor
Mayo Clinic
Other
Eligibility
65 Years and older
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2011
U.S. locations
5
States / cities
Scottsdale, Arizona • Evansville, Indiana • Rochester, Minnesota + 2 more
Source: ClinicalTrials.gov public record
Updated Apr 4, 2013 · Synced Oct 23, 2026, 1:15 AM EDT
Active, not recruiting No phase listed Observational

Longitudinal Coverage With Evidence Development Study on Micra AV Leadless Pacemakers (Micra AV CED)

NCT04235491
View directory record Official record
Conditions
Bradycardia
Interventions
Not listed
Lead sponsor
Medtronic
Industry
Eligibility
Not listed
Enrollment
37,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2029
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Oct 9, 2026 · Synced Oct 23, 2026, 1:15 AM EDT
Completed Phase 4 Interventional

Evaluation of the SafeR Mode in Patients With a Dual Chamber Pacemaker Indication

NCT00562107
View directory record Official record
Conditions
Assess the Benefits From the AAISafeR/SafeR Algorithm of Symphony 2550 or REPLYTM DR in a Wide Range of Pacemaker Patients.
Interventions
Symphony DR 2550 and REPLY DR cardiac pacemakers
Device
Lead sponsor
LivaNova
Industry
Eligibility
Not listed
Enrollment
650 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2013
U.S. locations
1
States / cities
Brighton, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 29, 2014 · Synced Oct 23, 2026, 1:15 AM EDT
Completed No phase listed Observational

Long-Term Results of DDD Pacing in Obstructive Hypertrophic Cardiomyopathy

NCT00001530
View directory record Official record
Conditions
Cardiomyopathy, Hypertrophic
Interventions
Not listed
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
Not listed
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1996 – 2000
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 4, 2008 · Synced Oct 23, 2026, 1:15 AM EDT
Active, not recruiting Not applicable Interventional

Fast Induced Remodeling in Heart Failure With Preserved Ejection Fraction

NCT05839730
View directory record Official record
Conditions
Heart Failure With Preserved Ejection Fraction, Concentric Hypertrophy
Interventions
Pacemaker PLR + TRT ON, Pacemaker non-pacing mode or an exertional rate-adaptive pacing mode with no planned pacing at rest.
Device
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
18 Years and older
Enrollment
105 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
8
States / cities
Naples, Florida • O'Fallon, Illinois • Springfield, Illinois + 5 more
Source: ClinicalTrials.gov public record
Updated Aug 3, 2026 · Synced Oct 23, 2026, 1:15 AM EDT
Recruiting Not applicable Interventional

ELEVATE-HFpEF Clinical Study

NCT06678841
View directory record Official record
Conditions
Heart Failure With Preserved Ejection Fraction (HFpEF)
Interventions
Personalized cardiac pacing
Device
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
40 Years and older
Enrollment
700 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2029
U.S. locations
26
States / cities
Phoenix, Arizona • Palo Alto, California • San Francisco, California + 22 more
Source: ClinicalTrials.gov public record
Updated Oct 2, 2026 · Synced Oct 23, 2026, 1:15 AM EDT