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ClinicalTrials.gov public records Last synced Oct 21, 2026, 8:59 PM EDT

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Showing 121–144 of 372 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Heart Rate Fast Clear all
Completed No phase listed Observational Results available

Gastrointestinal Symptoms in Postural Orthostatic Tachycardia Syndrome

NCT03263819
View directory record Official record
Conditions
Postural Tachycardia Syndrome
Interventions
Oral glucose tolerance test
Diagnostic Test
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 60 Years · Female only
Enrollment
26 participants
Timeline
2017 – 2020
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jul 8, 2024 · Synced Oct 21, 2026, 8:59 PM EDT
Terminated Phase 4 Interventional Results available

Phenylephrine Versus Norepinephrine for Septic Shock in Critically Ill Patients

NCT02203630
View directory record Official record
Conditions
Septic Shock, Sepsis, Shock, Tachycardia, Arrhythmia
Interventions
Phenylephrine, Norepinephrine
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jun 13, 2018 · Synced Oct 21, 2026, 8:59 PM EDT
Not yet recruiting Early Phase 1 Interventional

Guanfacine and Cromolyn Sodium for POTS: The DBPOTS Trial

NCT07757555
View directory record Official record
Conditions
Postural Orthostatic Tachycardia Syndrome (POTS), Dysautonomia, Orthostatic Intolerance, Autonomic Nervous System Diseases
Interventions
Guanfacine (GFC), Cromolyn Sodium, Placebo
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 100 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 9, 2026 · Synced Oct 21, 2026, 8:59 PM EDT
Terminated Not applicable Interventional Results available

Substrate Targeted Ablation Using the FlexAbility™ Ablation Catheter System for the Reduction of Ventricular Tachycardia

NCT02130765
View directory record Official record
Conditions
Monomorphic Ventricular Tachycardia
Interventions
Cardiac catheter ablation with ICD/CRT-D
Device
Lead sponsor
Abbott Medical Devices
Industry
Eligibility
18 Years to 75 Years
Enrollment
64 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
30
States / cities
Birmingham, Alabama • Los Angeles, California • San Diego, California + 21 more
Source: ClinicalTrials.gov public record
Updated Feb 12, 2019 · Synced Oct 21, 2026, 8:59 PM EDT
Completed Not applicable Interventional Results available

Vest Prevention of Early Sudden Death Trial and VEST Registry

NCT01446965
View directory record Official record
Conditions
Myocardial Infarction, Ventricular Dysfunction, Sudden Death, Ventricular Tachycardia, Ventricular Fibrillation
Interventions
wearable defibrillator
Device
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
2,348 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2019
U.S. locations
57
States / cities
Anchorage, Alaska • Fresno, California • Salinas, California + 47 more
Source: ClinicalTrials.gov public record
Updated Jan 20, 2021 · Synced Oct 21, 2026, 8:59 PM EDT
Completed Phase 3 Interventional

Etripamil Nasal Spray in Patients With Paroxysmal Supraventricular Tachycardia

NCT04952610
View directory record Official record
Conditions
Paroxysmal Supraventricular Tachycardia
Interventions
Etripamil NS 70 mg, Aptar Pharma Nasal Spray Bidose System
Drug · Device
Lead sponsor
Milestone Pharmaceuticals Inc.
Other
Eligibility
18 Years and older
Enrollment
130 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
17
States / cities
Little Rock, Arkansas • Vista, California • West Hills, California + 14 more
Source: ClinicalTrials.gov public record
Updated May 15, 2026 · Synced Oct 21, 2026, 8:59 PM EDT
Recruiting No phase listed Observational

Targeted Ablation to Isolate Scar Channels Causing Ventricular Tachycardia

NCT07814079
View directory record Official record
Conditions
Ventricular Tachycardia (VT), Ischemic Cardiomyopathy, Nonischemic Cardiomyopathy
Interventions
Selective Substrate Isolation
Procedure
Lead sponsor
New York Medical College
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
1
States / cities
Valhalla, New York
Source: ClinicalTrials.gov public record
Updated Sep 10, 2026 · Synced Oct 21, 2026, 8:59 PM EDT
Terminated No phase listed Observational

A Registry to Determine the Clinical and Genetic Risk Factors for Torsade De Pointes

NCT02439645
View directory record Official record
Conditions
Long qt Syndrome, Torsade de Pointes
Interventions
Not listed
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2019
U.S. locations
4
States / cities
Boston, Massachusetts • West Roxbury, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 3, 2021 · Synced Oct 21, 2026, 8:59 PM EDT
Completed No phase listed Observational

Comparison of Continuous Sternal ECG Patch Monitors (Carnation and Zio) Trial

NCT02952781
View directory record Official record
Conditions
Syncope, Presyncope, Atrial Fibrillation, Supraventricular Tachycardia
Interventions
EKG Patch monitors (Zio and Carnation)
Device
Lead sponsor
EvergreenHealth
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Kirkland, Washington
Source: ClinicalTrials.gov public record
Updated Mar 7, 2017 · Synced Oct 21, 2026, 8:59 PM EDT
Completed Phase 4 Interventional Results available

Remifentanil Intravenous Patient Controlled Analgesia (IVPCA) for Ablation of Idiopathic Ventricular Tachycardia

NCT01901575
View directory record Official record
Conditions
Tachycardia, Ventricular
Interventions
Remifentanil
Drug
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 65 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 2, 2018 · Synced Oct 21, 2026, 8:59 PM EDT
Recruiting No phase listed Observational

Fetal Electrophysiologic Abnormalities in High-Risk Pregnancies Associated With Fetal Demise

NCT03775954
View directory record Official record
Conditions
High Risk Pregnancy, Congenital Heart Disease, Fetal Hydrops, Twin Monochorionic Monoamniotic Placenta, Gastroschisis, Fetal Demise, Stillbirth, Fetal Arrhythmia, Long QT Syndrome, Intrauterine Fetal Death, Sudden Infant Death, Pregnancy Loss, Twin Twin Transfusion Syndrome, Birth Defect, Fetal Cardiac Anomaly, Fetal Cardiac Disorder, Fetal Death, Brugada Syndrome, Fetal Tachycardia
Interventions
Fetal Magnetocardiogram and Neonatal Electrocardiogram, Substudy only: Maternal/Infant Pharmacogenomic assessment postnatally
Diagnostic Test · Genetic
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
18 Years and older · Female only
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2028
U.S. locations
2
States / cities
Madison, Wisconsin • Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Mar 4, 2026 · Synced Oct 21, 2026, 8:59 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Heart Rate Variability in Children With a Functional Gastrointestinal Disorder

NCT00195975
View directory record Official record
Conditions
Abdominal Pain
Interventions
Not listed
Lead sponsor
Children's Mercy Hospital Kansas City
Other
Eligibility
8 Years to 17 Years
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2009
U.S. locations
1
States / cities
Kansas City, Missouri
Source: ClinicalTrials.gov public record
Updated Jun 28, 2011 · Synced Oct 21, 2026, 8:59 PM EDT
Completed Not applicable Interventional

AV Nodal Reentrant Tachycardia Study

NCT00618683
View directory record Official record
Conditions
Tachycardia, Atrioventricular Nodal Reentry
Interventions
Cardiac Invasive Electrophysiological Study
Procedure
Lead sponsor
University of Oklahoma
Other
Eligibility
16 Years to 80 Years
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2021
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated May 10, 2024 · Synced Oct 21, 2026, 8:59 PM EDT
Completed Phase 2 Interventional

Study of Natriuretic Peptide Receptor 1 (NPR1) Antagonist in Adult Patients With Postural Orthostatic Tachycardia Syndrome (POTS)

NCT06593600
View directory record Official record
Conditions
Postural Orthostatic Tachycardia Syndrome (POTS)
Interventions
REGN7544, Placebo
Drug
Lead sponsor
Regeneron Pharmaceuticals
Industry
Eligibility
18 Years to 55 Years
Enrollment
82 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
15
States / cities
Gilbert, Arizona • Carlsbad, California • Palo Alto, California + 12 more
Source: ClinicalTrials.gov public record
Updated Jul 21, 2026 · Synced Oct 21, 2026, 8:59 PM EDT
Terminated Phase 2 Interventional

Effectiveness of CRD-4730 in Participants With Catecholaminergic Polymorphic Ventricular Tachycardia (CPVT)

NCT06005428
View directory record Official record
Conditions
CPVT1, Heart Defects, Congenital, Heart Diseases, Ventricular Tachycardia
Interventions
CRD-4730, Placebo
Drug
Lead sponsor
Cardurion Pharmaceuticals, Inc.
Industry
Eligibility
18 Years to 99 Years
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
3
States / cities
Cincinnati, Ohio • Cleveland, Ohio • Houston, Texas
Source: ClinicalTrials.gov public record
Updated May 27, 2026 · Synced Oct 21, 2026, 8:59 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Local Vasoconstriction in Postural Tachycardia Syndrome

NCT01210430
View directory record Official record
Conditions
Postural Tachycardia Syndrome
Interventions
Losartan, Ascorbic Acid (Vitamin C), Normal Saline
Drug
Lead sponsor
New York Medical College
Other
Eligibility
14 Years to 29 Years
Enrollment
74 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2015
U.S. locations
1
States / cities
Hawthorne, New York
Source: ClinicalTrials.gov public record
Updated Jun 10, 2021 · Synced Oct 21, 2026, 8:59 PM EDT
Recruiting No phase listed Observational

ATrial Tachycardia PAcing Therapy in Congenital Heart

NCT03209583
View directory record Official record
Conditions
Atrial Arrhythmia, Atrial Tachycardia, Congenital Heart Disease, Pacemaker Re-Entrant Tachycardia
Interventions
Medtronic
Device
Lead sponsor
Ian Law
Other
Eligibility
Not listed
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2027
U.S. locations
14
States / cities
Los Angeles, California • Orange, California • Hollywood, Florida + 11 more
Source: ClinicalTrials.gov public record
Updated Mar 13, 2026 · Synced Oct 21, 2026, 8:59 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Unhide® Project: A Digital Health Platform to Collect Lifestyle Data for Brain Inflammation Research

NCT04806620
View directory record Official record
Conditions
Post-Acute COVID-19 Syndrome, ME/CFS, Rheumatic Arthritis, Juvenile Rheumatoid Arthritis (JRA), Psoriatic Arthritis (PsA), Ankylosing Spondylitis (AS), Autoimmune Encephalitis, Celiac Disease, Celiac Disease in Children, Chronic Lyme Disease, Post-treatment Lyme Disease Syndrome, Crohn's Disease, Dysautonomia, Anorexia Nervosa, Bulimia Nervosa, ARFID, Avoidant / Restrictive Food Intake Disorder, Ehlers Danlos Syndrome, Endometriosis, Fibromyalgia (FM), Long COVID, Lupus, Migraines, Mast Cell Activation Syndrome, Multiple Sclerosis, Myalgic Encephalomyelitis (ME), Myasthenia Gravis, Generalized, Myasthenia Gravis in Children, Narcolepsy, Obsessive Compulsive Disorder (OCD), PANDAS, Pediatric Acute-onset Neuropsychiatric Syndrome (PANS), POTS - Postural Orthostatic Tachycardia Syndrome, General Anxiety Disorder, Social Anxiety Disorder, PTSD - Post Traumatic Stress Disorder, Psoriasis, Traumatic Brain Injury, Tourette's Syndrome, Inflammatory Bowel Disease (IBD), Autoimmune Diseases, Neurological Diseases or Conditions, Psychiatric Disorder, Sjogren's Syndrome, Ulcerative Colitis and Crohn's Disease
Interventions
Not listed
Lead sponsor
Brain Inflammation Collaborative
Other
Eligibility
2 Years and older
Enrollment
10,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2030
U.S. locations
1
States / cities
Delafield, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jan 22, 2026 · Synced Oct 21, 2026, 8:59 PM EDT
Completed No phase listed Observational

Precision Event Monitoring for Patients With Heart Failure Using HeartLogic

NCT03579641
View directory record Official record
Conditions
Heart Failure, Defibrillators, Implantable, Monitoring, Physiologic, Cardiac Resynchronization Therapy, Cardiovascular Disease, Heart Disease
Interventions
HeartLogic Sensors
Device
Lead sponsor
Boston Scientific Corporation
Industry
Eligibility
18 Years and older
Enrollment
2,184 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
56
States / cities
Birmingham, Alabama • Jonesboro, Arkansas • Little Rock, Arkansas + 48 more
Source: ClinicalTrials.gov public record
Updated Oct 25, 2022 · Synced Oct 21, 2026, 8:59 PM EDT
Completed Phase 2 Interventional Results available

The Exercise Response to Pharmacologic Cholinergic Stimulation in Myalgic Encephalomyelitis / Chronic Fatigue Syndrome

NCT03674541
View directory record Official record
Conditions
Myalgic Encephalomyelitis/Chronic Fatigue Syndrome, Chronic Fatigue Syndrome, Myalgic Encephalomyelitis, Exercise Intolerance, Dysautonomia, Low Ventricular Filling Pressures (Preload Failure), Postural Orthostatic Tachycardia Syndrome, Orthostatic Hypotension, Fibromyalgia
Interventions
Pyridostigmine Bromide, Placebo
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 80 Years
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 8, 2022 · Synced Oct 21, 2026, 8:59 PM EDT
Completed Phase 3 Interventional Results available

Multicenter Study of Antiarrhythmic Medications for Treatment of Infants With Supraventricular Tachycardia

NCT00390546
View directory record Official record
Conditions
Supraventricular Tachycardia
Interventions
Digoxin, Propranolol
Drug
Lead sponsor
University of British Columbia
Other
Eligibility
Up to 4 Months
Enrollment
72 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2011
U.S. locations
10
States / cities
Los Angeles, California • Orange, California • Kansas City, Missouri + 7 more
Source: ClinicalTrials.gov public record
Updated Dec 13, 2017 · Synced Oct 21, 2026, 8:59 PM EDT
Not listed Phase 2 Interventional

Reduction of Intrapartum Fever With Intravenous Acetaminophen

NCT02625454
View directory record Official record
Conditions
Fever, Oxidative Stress
Interventions
Intravenous Acetaminophen, Oral Acetaminophen
Drug
Lead sponsor
Richmond University Medical Center
Other
Eligibility
18 Years and older · Female only
Enrollment
168 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
1
States / cities
Staten Island, New York
Source: ClinicalTrials.gov public record
Updated Jul 17, 2019 · Synced Oct 21, 2026, 8:59 PM EDT
Completed Not applicable Interventional

CyberHeart's Cardiac Arrhythmia Ablation Treatment: Patients With Refractory Ventricular Tachycardia/Fibrillation

NCT02661048
View directory record Official record
Conditions
Tachycardia, Ventricular
Interventions
CyberHeart System
Device
Lead sponsor
Varian, a Siemens Healthineers Company
Industry
Eligibility
60 Years and older
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2023
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Sep 7, 2023 · Synced Oct 21, 2026, 8:59 PM EDT
Completed No phase listed Observational

Non-Invasive 3D Mapping for Identifying Origin and Preferential Propagation of Ventricular Arrhythmias

NCT03831516
View directory record Official record
Conditions
Premature Ventricular Complex, Ventricular Arrythmia
Interventions
Non Invasive Electroanatomical Mapping
Diagnostic Test
Lead sponsor
Northwell Health
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 20, 2022 · Synced Oct 21, 2026, 8:59 PM EDT