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ClinicalTrials.gov public records Last synced Oct 23, 2026, 12:36 PM EDT

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Showing 265–288 of 372 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Heart Rate Fast Clear all
Completed Not applicable Interventional

Accuracy of the Apple Watch Series 4 for Detection of Heart Rhythm: A Pilot Study

NCT03798613
View directory record Official record
Conditions
Heart Rate Fast, Heart Rate Low
Interventions
Apple Watch 4 Series Device, Continuous Telemetry Monitor
Device
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 9, 2019 · Synced Oct 23, 2026, 12:36 PM EDT
Completed Not applicable Interventional Results available

Multicenter Automatic Defibrillator Implantation Trial With Subcutaneous Implantable Cardioverter Defibrillator

NCT02787785
View directory record Official record
Conditions
Tachycardia, Diabetes Mellitus, Cardiovascular Disease
Interventions
Subcutaneous Implantable Cardioverter Defibrillator
Device
Lead sponsor
Boston Scientific Corporation
Industry
Eligibility
65 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2023
U.S. locations
36
States / cities
Huntsville, Alabama • Scottsdale, Arizona • Jonesboro, Arkansas + 31 more
Source: ClinicalTrials.gov public record
Updated Aug 22, 2024 · Synced Oct 23, 2026, 12:36 PM EDT
Recruiting No phase listed Observational

PERceptions of Diltiazem Versus ADEnosine for Treatment of Supraventricular Tachycardia in the Emergency Department

NCT07086560
View directory record Official record
Conditions
Supraventricular Tachycardia (SVT)
Interventions
IV adenosine, IV diltiazem
Drug
Lead sponsor
University of Iowa
Other
Eligibility
18 Years to 100 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Aug 21, 2026 · Synced Oct 23, 2026, 12:36 PM EDT
Completed Phase 3 Interventional Results available

Effect of Ivabradine on Patients With Postural Orthostatic Tachycardia Syndrome

NCT03182725
View directory record Official record
Conditions
Postural Orthostatic Tachycardia Syndrome
Interventions
Ivabradine, Placebo
Drug
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years to 65 Years
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Jun 29, 2021 · Synced Oct 23, 2026, 12:36 PM EDT
Completed No phase listed Observational

Prospective Observational Cohort Study of Fetal Atrial Flutter & Supraventricular Tachycardia

NCT03376438
View directory record Official record
Conditions
Atrial Flutter, Tachycardia, Supraventricular, Tachycardia, Atrial Ectopic, Tachycardia, Reciprocating, Tachycardia Atrial, Tachycardia, Atrioventricular Nodal Reentry, Tachycardia, Paroxysmal, Fetal Hydrops
Interventions
Prospective observational cohorts
Other
Lead sponsor
Edgar Jaeggi
Other
Eligibility
16 Years to 50 Years · Female only
Enrollment
330 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2025
U.S. locations
18
States / cities
Phoenix, Arizona • San Francisco, California • Denver, Colorado + 15 more
Source: ClinicalTrials.gov public record
Updated May 31, 2025 · Synced Oct 23, 2026, 12:36 PM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Detection and Classification of Cardiac Rhythm and Atrial Fibrillation Using a Finger-worn Ring

NCT06892938
View directory record Official record
Conditions
Atrial Fibrillation (AF), Arrhythmias Cardiac, Tachycardia, Palpitations, Bradycardia
Interventions
Atrial Fibrillation Identification
Diagnostic Test
Lead sponsor
Everbeat
Industry
Eligibility
18 Years and older
Enrollment
232 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
3
States / cities
La Jolla, California • Baton Rouge, Louisiana • Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 27, 2025 · Synced Oct 23, 2026, 12:36 PM EDT
Active, not recruiting Phase 2 Interventional

Restoring Iron Deficiency in POTS

NCT07197905
View directory record Official record
Conditions
POTS - Postural Orthostatic Tachycardia Syndrome
Interventions
Intravenous iron
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 13, 2026 · Synced Oct 23, 2026, 12:36 PM EDT
Completed Phase 3 Interventional

Prospective Randomized Clinical Trial of Fetal Atrial Flutter & Supraventricular Tachycardia Therapy (FAST RCT)

NCT02624765
View directory record Official record
Conditions
Fetal Atrial Flutter Without Hydrops, Fetal Supraventricular Tachycardia Without Hydrops, Fetal Supraventricular Tachycardia With Hydrops
Interventions
Digoxin (monotherapy), Sotalol (monotherapy), Flecainide (monotherapy), Digoxin (dual therapy), Sotalol (dual therapy), Flecainide (dual therapy)
Drug
Lead sponsor
Edgar Jaeggi
Other
Eligibility
16 Years to 50 Years · Female only
Enrollment
105 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2024
U.S. locations
12
States / cities
San Francisco, California • Aurora, Colorado • Washington D.C., District of Columbia + 8 more
Source: ClinicalTrials.gov public record
Updated May 22, 2024 · Synced Oct 23, 2026, 12:36 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Standing Cognition and Co-morbidities of POTS Evaluation

NCT03602482
View directory record Official record
Conditions
Postural Tachycardia Syndrome, Ehlers-Danlos Syndrome
Interventions
Standing, Supine
Behavioral
Lead sponsor
Milton S. Hershey Medical Center
Other
Eligibility
13 Years to 60 Years
Enrollment
139 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Hershey, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 14, 2021 · Synced Oct 23, 2026, 12:36 PM EDT
Completed Not applicable Interventional Results available

Inducibility and Stability of Ventricular Tachycardia Inpatients Undergoing VT Ablation Under General Anesthesia

NCT02419547
View directory record Official record
Conditions
Ventricular Tachycardia
Interventions
Versed, Fentanyl, Propofol, Sevoflurane
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 9, 2019 · Synced Oct 23, 2026, 12:36 PM EDT
Terminated Phase 2 Interventional Results available

Treatment of Ventricular Tachyarrhythmias Refractory To Shock With Beta Blockers: The SHOCK and BLOCK Trial

NCT00401882
View directory record Official record
Conditions
Cardiac Arrest, Sudden Cardiac Death, Ventricular Fibrillation, Tachycardia, Ventricular
Interventions
Epinephrine, Metoprolol
Drug
Lead sponsor
David Haines, MD
Other
Eligibility
18 Years and older
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2012
U.S. locations
1
States / cities
Royal Oak, Michigan
Source: ClinicalTrials.gov public record
Updated May 25, 2017 · Synced Oct 23, 2026, 12:36 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Non-invasive Vagal Neurostimulation (nVNS) in Adolescents With Postural Orthostatic Tachycardia Syndrome (POTS)

NCT06268288
View directory record Official record
Conditions
Postural Tachycardia Syndrome, Autonomic Dysfunction, Postural Orthostatic Tachycardia Syndrome, POTS - Postural Orthostatic Tachycardia Syndrome
Interventions
GammaCore intervention, STEPS management protocol
Device · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
12 Years to 19 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
2
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Oct 31, 2025 · Synced Oct 23, 2026, 12:36 PM EDT
Recruiting Not applicable Interventional

Ventricular Tachycardia Mechanisms

NCT05478213
View directory record Official record
Conditions
Ventricular Tachycardia
Interventions
Monophasic Action Potential (MAP) Catheter
Device
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
3
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jun 30, 2026 · Synced Oct 23, 2026, 12:36 PM EDT
Completed Phase 2 Interventional Results available

Efficacy and Safety of Intranasal MSP-2017 (Etripamil) for the Conversion of PSVT to Sinus Rhythm

NCT02296190
View directory record Official record
Conditions
Paroxysmal Supraventricular Tachycardia (PSVT)
Interventions
Etripamil, Placebo
Drug
Lead sponsor
Milestone Pharmaceuticals Inc.
Other
Eligibility
18 Years and older
Enrollment
199 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
26
States / cities
Phoenix, Arizona • Sacramento, California • Littleton, Colorado + 19 more
Source: ClinicalTrials.gov public record
Updated Dec 30, 2020 · Synced Oct 23, 2026, 12:36 PM EDT
Completed No phase listed Observational

Ventricular Synchrony in Pediatric Patients

NCT00165932
View directory record Official record
Conditions
Irregular Heart Rate
Interventions
Not listed
Lead sponsor
Emory University
Other
Eligibility
Not listed
Enrollment
145 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2009
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jun 1, 2012 · Synced Oct 23, 2026, 12:36 PM EDT
Not listed Phase 4 Interventional

Safety of Amiodarone and Ranolazine Together in Patients With Angina

NCT01558830
View directory record Official record
Conditions
Chronic Stable Angina, Coronary Artery Disease, Atrial Fibrillation, Ventricular Tachycardia
Interventions
ranolazine, placebo
Drug
Lead sponsor
Cardiovascular Consultants of Nevada
Other
Eligibility
35 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
3
States / cities
Henderson, Nevada • Las Vegas, Nevada
Source: ClinicalTrials.gov public record
Updated Mar 21, 2012 · Synced Oct 23, 2026, 12:36 PM EDT
Completed Phase 3 Interventional Results available

Ranolazine Implantable Cardioverter-Defibrillator Trial

NCT01215253
View directory record Official record
Conditions
Ischemic Cardiomyopathy, Nonischemic Cardiomyopathy, Heart Failure
Interventions
Ranolazine
Drug
Lead sponsor
University of Rochester
Other
Eligibility
21 Years and older
Enrollment
1,012 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2017
U.S. locations
83
States / cities
Tucson, Arizona • Little Rock, Arkansas • East Palo Alto, California + 70 more
Source: ClinicalTrials.gov public record
Updated Aug 27, 2018 · Synced Oct 23, 2026, 12:36 PM EDT
Completed Not applicable Interventional

A Randomized Trial of Remote Monitoring of Implantable Cardioverter Defibrillators Versus Quarterly Device Interrogations in Clinic

NCT00606567
View directory record Official record
Conditions
Tachycardia, Ventricular, Ventricular Fibrillation
Interventions
Methods for monitoring patients with ICD's
Other
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
151 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2010
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 14, 2014 · Synced Oct 23, 2026, 12:36 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Dopamine in Orthostatic Tolerance

NCT00748228
View directory record Official record
Conditions
Postural Tachycardia Syndrome
Interventions
dietary sodium
Dietary Supplement
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years to 60 Years
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2012
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jun 15, 2015 · Synced Oct 23, 2026, 12:36 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Implementation of Transdx Group for POTS

NCT03185247
View directory record Official record
Conditions
Dysautonomia, Anxiety, Depression
Interventions
Transdiagnostic Group-Based Treatment
Behavioral
Lead sponsor
University of Colorado, Denver
Other
Eligibility
13 Years to 18 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Sep 26, 2019 · Synced Oct 23, 2026, 12:36 PM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Assessment of Antibodies and Inflammatory Markers in Postural Tachycardia Syndrome

NCT02196376
View directory record Official record
Conditions
Postural Orthostatic Tachycardia Syndrome
Interventions
History, Physical, blood draw, Questionnaires
Other · Behavioral
Lead sponsor
Vanderbilt University
Other
Eligibility
13 Years to 80 Years
Enrollment
212 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2029
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 16, 2026 · Synced Oct 23, 2026, 12:36 PM EDT
Completed No phase listed Observational

MAVRIC VR ICD Registry

NCT00270933
View directory record Official record
Conditions
Ventricular Tachycardia, Ventricular Fibrillation
Interventions
Registry
Device
Lead sponsor
Medtronic Cardiac Rhythm and Heart Failure
Industry
Eligibility
18 Years and older
Enrollment
742 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2005
U.S. locations
81
States / cities
Birmingham, Alabama • Tuscaloosa, Alabama • Little Rock, Arkansas + 78 more
Source: ClinicalTrials.gov public record
Updated Dec 21, 2023 · Synced Oct 23, 2026, 12:36 PM EDT
Completed No phase listed Observational

iPod and Other MP3 Players on ICDs and Pacemakers in Children

NCT00542854
View directory record Official record
Conditions
Heart Block, Bradycardia, Tachycardia, Arrhythmia
Interventions
MP3
Device
Lead sponsor
Boston Children's Hospital
Other
Eligibility
4 Years to 55 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 28, 2009 · Synced Oct 23, 2026, 12:36 PM EDT
Completed Not applicable Interventional Results available

Understanding Outcomes With the EMBLEM™ S-ICD in Primary Prevention Patients With Low Ejection Fraction

NCT02433379
View directory record Official record
Conditions
Ventricular Fibrillation, Ventricular Tachycardia, Low Cardiac Output
Interventions
EMBLEM S-ICD System
Device
Lead sponsor
Boston Scientific Corporation
Industry
Eligibility
21 Years and older
Enrollment
1,173 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
69
States / cities
Birmingham, Alabama • Huntsville, Alabama • Gilbert, Arizona + 62 more
Source: ClinicalTrials.gov public record
Updated Mar 24, 2025 · Synced Oct 23, 2026, 12:36 PM EDT