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ClinicalTrials.gov public records Last synced Oct 21, 2026, 3:37 PM EDT

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Showing 97–120 of 372 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Heart Rate Fast Clear all
Completed No phase listed Observational Accepts healthy volunteers

Assessment of Vascular Endothelial Function in Postural Tachycardia Syndrome

NCT01308099
View directory record Official record
Conditions
Postural Tachycardia Syndrome
Interventions
Blood Pressure and Blood Flow
Device
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 60 Years
Enrollment
26 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2017
U.S. locations
2
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 18, 2017 · Synced Oct 21, 2026, 3:37 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 21, 2026, 3:37 PM EDT
Completed No phase listed Observational

An Observational Study (Called RETAF-PS) Using a Patient Survey to Learn More About Treatment Outcomes in Patients With Irregular and Often Rapid Heartbeat (Atrial Fibrillation) Treated With Apixaban in a Real World Setting

NCT05471830
View directory record Official record
Conditions
Prevention of Thromboembolic Events, Atrial Fibrillation
Interventions
Apixaban
Drug
Lead sponsor
Bayer
Industry
Eligibility
45 Years and older
Enrollment
600 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Whippany, New Jersey
Source: ClinicalTrials.gov public record
Updated Dec 12, 2023 · Synced Oct 21, 2026, 3:37 PM EDT
Terminated No phase listed Observational

The PSVT Place Registry.Paroxysmal Supraventricular Tachycardia (PSVT) Registry.

NCT03353610
View directory record Official record
Conditions
Paroxysmal Supraventricular Tachycardia (PSVT)
Interventions
Not listed
Lead sponsor
Milestone Pharmaceuticals Inc.
Other
Eligibility
Not listed
Enrollment
354 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Dec 3, 2020 · Synced Oct 21, 2026, 3:37 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 21, 2026, 3:37 PM EDT
Completed No phase listed Observational

Circulating Biomarkers and Ventricular Tachyarrhythmia

NCT01892462
View directory record Official record
Conditions
Cardiomyopathy, Ventricular Tachycardia, Ventricular Fibrillation
Interventions
Not listed
Lead sponsor
Ochsner Health System
Other
Eligibility
18 Years and older
Enrollment
220 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
1
States / cities
New Orleans, Louisiana
Source: ClinicalTrials.gov public record
Updated Apr 7, 2017 · Synced Oct 21, 2026, 3:37 PM EDT
Terminated Not applicable Interventional

Unpinning Termination Therapy for VT (US)

NCT03093051
View directory record Official record
Conditions
Ventricular Tachycardia
Interventions
Unpinning Termination therapy
Device
Lead sponsor
Cardialen, Inc.
Industry
Eligibility
18 Years to 80 Years
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
7
States / cities
Sacramento, California • Des Moines, Iowa • Minneapolis, Minnesota + 3 more
Source: ClinicalTrials.gov public record
Updated Oct 10, 2022 · Synced Oct 21, 2026, 3:37 PM EDT
Completed Phase 2 Interventional Results available

Esmolol Infusion for Patients With Septic Shock and Persistent Tachycardia

NCT02841241
View directory record Official record
Conditions
Septic Shock
Interventions
Esmolol
Drug
Lead sponsor
Intermountain Health Care, Inc.
Other
Eligibility
18 Years and older
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Murray, Utah
Source: ClinicalTrials.gov public record
Updated Jan 9, 2019 · Synced Oct 21, 2026, 3:37 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Autoimmune Basis for Postural Tachycardia Syndrome

NCT05043051
View directory record Official record
Conditions
Postural Tachycardia Syndrome
Interventions
Vagal stimulation, Sham stimulation
Device
Lead sponsor
University of Oklahoma
Other
Eligibility
18 Years to 80 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Jul 29, 2026 · Synced Oct 21, 2026, 3:37 PM EDT
Completed No phase listed Observational

Effects of Monopolar Electrocautery Use During Surgery on Implanted Cardiac Defibrillators

NCT01572246
View directory record Official record
Conditions
Heart Failure, Tachycardia, Ventricular
Interventions
Optimal placement of return pad
Other
Lead sponsor
Oregon Health and Science University
Other
Eligibility
18 Years and older
Enrollment
167 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Feb 24, 2017 · Synced Oct 21, 2026, 3:37 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Influence of Progesterone Administration on Drug-Induced QT Interval Lengthening

NCT01929083
View directory record Official record
Conditions
Prolonged QT Interval in EKG and Sudden Death
Interventions
Progesterone, Placebo, Ibutilide
Drug
Lead sponsor
Indiana University
Other
Eligibility
21 Years to 40 Years · Female only
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
2
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Oct 30, 2015 · Synced Oct 21, 2026, 3:37 PM EDT
Completed Phase 2Phase 3 Interventional Results available

A Clinical Trial Utilizing Dantrolene in Patients With Ventricular Arrhythmias.

NCT04134845
View directory record Official record
Conditions
Ventricular Tachycardia
Interventions
Dantrolene/Ryanodex, Placebo
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
68 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2025
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 8, 2026 · Synced Oct 21, 2026, 3:37 PM EDT
Completed No phase listed Observational

The Simple ECG Monitoring Trial (Comparison of a Novel Recording System With a Standard Holter Monitor)

NCT01382953
View directory record Official record
Conditions
Syncope, Pre-syncope, Atrial Fibrillation, Supraventricular Tachycardia
Interventions
Standard Holter/Investigational patch
Device
Lead sponsor
Seattle Institute for Cardiac Research
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011
U.S. locations
2
States / cities
Chicago, Illinois • Enumclaw, Washington
Source: ClinicalTrials.gov public record
Updated Jan 10, 2012 · Synced Oct 21, 2026, 3:37 PM EDT
Completed Not applicable Interventional Results available

Using Non-Fluoroscopic Imaging Devices to Decrease Radiation Exposure During Ablation of Supraventricular Tachycardia

NCT00979303
View directory record Official record
Conditions
Supraventricular Tachycardia
Interventions
Intracardiac echocardiography and 3D navigational system
Device
Lead sponsor
Boston Children's Hospital
Other
Eligibility
8 Years to 21 Years
Enrollment
74 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 8, 2018 · Synced Oct 21, 2026, 3:37 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

The Renin-Aldosterone Axis in Postural Tachycardia Syndrome

NCT00962949
View directory record Official record
Conditions
Postural Orthostatic Tachycardia Syndrome (POTS)
Interventions
Angiotensin II
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 64 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Sep 16, 2025 · Synced Oct 21, 2026, 3:37 PM EDT
Enrolling by invitation Not applicable Interventional Accepts healthy volunteers

Autoimmune Basis for Postural Tachycardia Syndrome

NCT02725060
View directory record Official record
Conditions
Postural Orthostatic Tachycardia Syndrome, Postural Tachycardia Syndrome, Tachycardia, Arrhythmias, Cardiac, Autonomic Nervous System Diseases, Orthostatic Intolerance, Cardiovascular Diseases, Primary Dysautonomias
Interventions
phenylephrine, isoproterenol, 25 micro-Ci of radiation, Posture study with blood samples, 24-hour heart rhythm and blood pressure monitoring, Quantitative Axonal Sudomotor Reflex Testing, Autonomic function tests, Rebreathing test, Assessment of splanchnic capacitance, microneurography
Drug · Radiation · Procedure + 1 more
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 50 Years
Enrollment
58 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2026
U.S. locations
2
States / cities
Oklahoma City, Oklahoma • Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Nov 12, 2025 · Synced Oct 21, 2026, 3:37 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Transseptal vs Retrograde Aortic Ventricular Entry to Reduce Systemic Emboli

NCT03946072
View directory record Official record
Conditions
Neurocognitive Dysfunction
Interventions
Transseptal Aortic Approach Catheter Ablation Procedure, Retrograde Aortic Approach Catheter Ablation Procedure
Procedure
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
153 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
20
States / cities
Phoenix, Arizona • Los Angeles, California • Palo Alto, California + 14 more
Source: ClinicalTrials.gov public record
Updated Dec 26, 2023 · Synced Oct 21, 2026, 3:37 PM EDT
Completed Not applicable Interventional Results available

Imaging With a Radio Tracer to Guide VT Ablations

NCT01250912
View directory record Official record
Conditions
Ventricular Tachycardia, Arrhythmia
Interventions
123I-metaiodobenzylguanidine
Drug
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2019
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 27, 2022 · Synced Oct 21, 2026, 3:37 PM EDT
Recruiting Not applicable Interventional

Cardiac RADIoablation Versus Repeat Catheter Ablation: a Pivotal Randomized Clinical Trial Evaluating Safety and Efficacy for Patients With High-risk Refractory Ventricular Tachycardia (RADIATE-VT)

NCT05765175
View directory record Official record
Conditions
Tachycardia, Ventricular
Interventions
Varian Cardiac Radioablation (CRA), Catheter Ablation (CA)
Device · Procedure
Lead sponsor
Varian, a Siemens Healthineers Company
Industry
Eligibility
18 Years and older
Enrollment
380 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2030
U.S. locations
11
States / cities
Los Angeles, California • Hartford, Connecticut • Boston, Massachusetts + 8 more
Source: ClinicalTrials.gov public record
Updated Apr 22, 2026 · Synced Oct 21, 2026, 3:37 PM EDT
Completed Not applicable Interventional

AIMIGo 12L ECG Synthesis Software Pivotal Study for Arrythmia Detection

NCT06123130
View directory record Official record
Conditions
Arrhythmias, Cardiac, Atrial Fibrillation, Atrial Flutter, Bradycardia, Tachycardia
Interventions
Vectorcardiography (VECG)
Device
Lead sponsor
HeartBeam, Inc.
Industry
Eligibility
18 Years and older
Enrollment
198 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024
U.S. locations
5
States / cities
Atlanta, Georgia • Tucker, Georgia • New York, New York + 2 more
Source: ClinicalTrials.gov public record
Updated Jul 5, 2024 · Synced Oct 21, 2026, 3:37 PM EDT
Completed Not applicable Interventional

Pharmacist Use of ECG to Inform Drug Therapy Decisions for Patients Receiving QT Prolonging Medications

NCT04000542
View directory record Official record
Conditions
Torsades de Pointe Caused by Drug (Disorder), Torsades de Pointes, Qt Interval, Variation in
Interventions
Pharmacist Intervention
Other
Lead sponsor
Northeast Iowa Medical Education Foundation
Other
Eligibility
18 Years and older
Enrollment
54 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Waterloo, Iowa
Source: ClinicalTrials.gov public record
Updated Apr 9, 2020 · Synced Oct 21, 2026, 3:37 PM EDT
Recruiting Not applicable Interventional

Functional ElectroAnatomiC Isochronal Late Activation Mapping for Empiric VT Ablation Trial

NCT06931821
View directory record Official record
Conditions
Sustained Monomorphic VT (MMVT), Recurrent Ventricular Tachycardia
Interventions
Isochronal Late Activation Mapping (ILAM), High Density Voltage Mapping
Device
Lead sponsor
University of Arizona
Other
Eligibility
18 Years and older
Enrollment
360 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2029
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Jul 27, 2026 · Synced Oct 21, 2026, 3:37 PM EDT
Active, not recruiting Early Phase 1 Interventional

Autonomic Determinants of POTS - Pilot 2

NCT04140721
View directory record Official record
Conditions
Postural Tachycardia Syndrome
Interventions
Placebo oral tablet, Moxonidine Pill
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 55 Years · Female only
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Mar 27, 2026 · Synced Oct 21, 2026, 3:37 PM EDT
Completed Not applicable Interventional Results available

Percutaneous Hemodynamic Support With Impella 2.5 During Scar-related Ventricular Tachycardia Ablation

NCT01294267
View directory record Official record
Conditions
Ventricular Tachycardia
Interventions
Circulatory Support System
Device
Lead sponsor
Vivek Reddy
Other
Eligibility
18 Years to 90 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 14, 2018 · Synced Oct 21, 2026, 3:37 PM EDT