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Showing 1–24 of 90 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Contraction Clear all
Completed No phase listed Observational

Screening and Natural History: Primary Lateral Sclerosis and Related Disorders

NCT00015444
View directory record Official record
Conditions
Primary Lateral Sclerosis
Interventions
Not listed
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
18 Years and older
Enrollment
189 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2019
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 15, 2019 · Synced Sep 10, 2026, 3:30 PM EDT
Terminated No phase listed Observational

Examining Developmental Changes in Heart Contractions of Children With Congenital Heart Defects

NCT00860327
View directory record Official record
Conditions
Hypoplastic Left Heart Syndrome, Tetralogy of Fallot
Interventions
Not listed
Lead sponsor
Emory University
Other
Eligibility
1 Day to 1 Year
Enrollment
375 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2016
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Aug 21, 2016 · Synced Sep 10, 2026, 3:30 PM EDT
Completed Not applicable Interventional

VIVO™ Accuracy Study

NCT03340142
View directory record Official record
Conditions
Premature Ventricular Contraction, Ventricular Tachycardia
Interventions
VIVO™
Device
Lead sponsor
Catheter Precision. Inc.
Industry
Eligibility
18 Years and older
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018
U.S. locations
3
States / cities
Iowa City, Iowa • Baltimore, Maryland • Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Nov 14, 2018 · Synced Sep 10, 2026, 3:30 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A System for Lengthening Contraction Training of Muscle

NCT00575107
View directory record Official record
Conditions
Healthy
Interventions
Exercise
Other
Lead sponsor
University of Michigan
Other
Eligibility
65 Years to 80 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2009
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Aug 3, 2011 · Synced Sep 10, 2026, 3:30 PM EDT
Not listed Not applicable Interventional

An Evaluation of an SCCD on the Symptomatology of Painful DPN

NCT03331614
View directory record Official record
Conditions
Painful Diabetic Neuropathy
Interventions
Flowaid FA-100 SCCD
Device
Lead sponsor
Rosenblum, Jonathan I., DPM
Individual
Eligibility
18 Years to 90 Years
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Lodi, New Jersey
Source: ClinicalTrials.gov public record
Updated Nov 5, 2017 · Synced Sep 10, 2026, 3:30 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of a Novel Stretching Technique on Shoulder Range of Motion and Voluntary Contraction in Overhead Athletes With Glenohumeral Internal Rotation Deficits "GIRD"

NCT03044236
View directory record Official record
Conditions
Glenohumeral Internal Rotation Deficits
Interventions
Stretching
Procedure
Lead sponsor
Loma Linda University
Other
Eligibility
18 Years to 45 Years
Enrollment
56 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Loma Linda, California
Source: ClinicalTrials.gov public record
Updated Jun 10, 2019 · Synced Sep 10, 2026, 3:30 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Safety and Efficacy of the MyokinE100 (CL-EMS Alpha) Device in Inducing Visible Muscle Contraction in Healthy Volunteers

NCT06023511
View directory record Official record
Conditions
ICU Acquired Weakness
Interventions
Electrical muscle stimulation
Device
Lead sponsor
Health Discovery Labs
Industry
Eligibility
18 Years to 65 Years
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Sep 25, 2023 · Synced Sep 10, 2026, 3:30 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effects of Light on Melatonin and Contractions in Pregnant Women

NCT01863446
View directory record Official record
Conditions
Pregnancy
Interventions
Lighting1, Lighting2
Device
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 35 Years · Female only
Enrollment
51 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2023
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 26, 2024 · Synced Sep 10, 2026, 3:30 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Defecation Patterns in Constipated Patients

NCT04903470
View directory record Official record
Conditions
Constipation by Outlet Obstruction
Interventions
Bisacodyl, Atropin
Drug
Lead sponsor
The California Medical Innovations Institute, Inc.
Other
Eligibility
21 Years to 75 Years
Enrollment
130 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
2
States / cities
San Diego, California • Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Oct 20, 2025 · Synced Sep 10, 2026, 3:30 PM EDT
Withdrawn Phase 1 Interventional

Pilot Study of Electronic Uterine Contraction Inhibitor

NCT00994058
View directory record Official record
Conditions
Prematurity
Interventions
Electrical Inhibition (EI) Uterine Pacemaker
Device
Lead sponsor
Winthrop University Hospital
Other
Eligibility
18 Years to 50 Years · Female only
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
Mineola, New York
Source: ClinicalTrials.gov public record
Updated Dec 23, 2015 · Synced Sep 10, 2026, 3:30 PM EDT
Enrolling by invitation Not applicable Interventional

Computational Cardiac Imaging Analysis to Guide Ventricular Tachycardia Ablation Procedures (AI-VT)

NCT06964152
View directory record Official record
Conditions
Ventricular Tachycardia (VT), Premature Ventricular Contraction (PVC), Ventricular Fibrillation
Interventions
Computational electrocardiography and cardiac computed tomography mapping
Diagnostic Test
Lead sponsor
University of California, San Diego
Other
Eligibility
21 Years to 90 Years
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2034
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated May 8, 2025 · Synced Sep 10, 2026, 3:30 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Coffee and Real-time Atrial and Ventricular Ectopy

NCT03671759
View directory record Official record
Conditions
Premature Atrial Contractions, Premature Ventricular Contractions
Interventions
Start: On Caffeine, Start: Off Caffeine
Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
108 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Oct 6, 2022 · Synced Sep 10, 2026, 3:30 PM EDT
Completed Phase 4 Interventional Results available

DOACs for Stroke Prevention Post Ventricular Tachycardia Ablation

NCT02666742
View directory record Official record
Conditions
Ventricular Tachycardia, Premature Ventricular Contraction, Stroke
Interventions
DOAC, Aspirin
Drug
Lead sponsor
Kansas City Heart Rhythm Institute
Other
Eligibility
18 Years to 80 Years
Enrollment
246 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
4
States / cities
Kansas City, Kansas • Overland Park, Kansas • The Bronx, New York + 1 more
Source: ClinicalTrials.gov public record
Updated Aug 21, 2022 · Synced Sep 10, 2026, 3:30 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

The Heart Rhythm Twins Study

NCT05866731
View directory record Official record
Conditions
Premature Atrial Complex, Premature Ventricular Contraction
Interventions
Not listed
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
156 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Mar 8, 2026 · Synced Sep 10, 2026, 3:30 PM EDT
Completed No phase listed Observational

Noninvasive Monitoring of Uterine Activity and Fetal Heart Rate

NCT05782296
View directory record Official record
Conditions
Fetal Heart Rate or Rhythm Abnormality Affecting Newborn During Labor, Uterine Contractions, Obstetric Complication
Interventions
TrueLabor
Device
Lead sponsor
OB-Tools Ltd.
Industry
Eligibility
18 Years and older · Female only
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
2
States / cities
Hoffman Estates, Illinois • The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Mar 26, 2025 · Synced Sep 10, 2026, 3:30 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Mental Effort and Muscle Strength

NCT00059436
View directory record Official record
Conditions
Aging, Muscle Strength
Interventions
Mental effort in muscle strengthening
Behavioral
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
65 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 1999
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 25, 2016 · Synced Sep 10, 2026, 3:30 PM EDT
Completed Not applicable Interventional Results available

Combined Application of Electrical Stimulation and Volitional Contractions for Muscle Strengthening and Knee Pain Inhibition (Seated Study)

NCT02802878
View directory record Official record
Conditions
Knee Osteoarthritis
Interventions
Hybrid Training using Electrodes and Joint Motion Sensors, Isokinetic Training with Isokinetic Dynamometer
Device
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
40 Years to 85 Years · Female only
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated May 17, 2018 · Synced Sep 10, 2026, 3:30 PM EDT
Recruiting Early Phase 1 Interventional

Impact of rTMS on Abnormal Cortical fMRI in Patients With Dystonia

NCT07626216
View directory record Official record
Conditions
Dystonia Disorder
Interventions
Transcranial Magnetic Stimulation
Device
Lead sponsor
Northwell Health
Other
Eligibility
18 Years to 80 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Manhasset, New York
Source: ClinicalTrials.gov public record
Updated Jun 3, 2026 · Synced Sep 10, 2026, 3:30 PM EDT
Terminated Not applicable Interventional Results available

Early Elimination of Premature Ventricular Contractions in Heart Failure

NCT01757067
View directory record Official record
Conditions
Premature Ventricular Contractions, Congestive Heart Failure
Interventions
PVC ablation
Device
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2017
U.S. locations
7
States / cities
Los Angeles, California • Baltimore, Maryland • Boston, Massachusetts + 3 more
Source: ClinicalTrials.gov public record
Updated Mar 17, 2021 · Synced Sep 10, 2026, 3:30 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Pain Inhibition With Neuromuscular Electrical Stimulation

NCT05280522
View directory record Official record
Conditions
Healthy Participants
Interventions
Volitional Contractions (VOL), Neuromuscular Electrical Stimulation (NMES), Noxious Electrical Stimulation (NXES)
Other · Device
Lead sponsor
University of New England
Other
Eligibility
18 Years to 30 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Portland, Maine
Source: ClinicalTrials.gov public record
Updated Mar 14, 2022 · Synced Sep 10, 2026, 3:30 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Use of MIBG Scan Images in PVC Ablations

NCT02279030
View directory record Official record
Conditions
Premature Ventricular Contractions
Interventions
MIBG nuclear scan
Other
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2019
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 7, 2022 · Synced Sep 10, 2026, 3:30 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Pilot Study to Evaluate a Prototype Electronic Uterine Inhibitor to Prevent Preterm Contractions

NCT00212446
View directory record Official record
Conditions
Preterm Birth
Interventions
Electrical Intervention (EI)
Device
Lead sponsor
St. Luke's-Roosevelt Hospital Center
Other
Eligibility
18 Years and older · Female only
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2012
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Dec 16, 2018 · Synced Sep 10, 2026, 3:30 PM EDT
Completed No phase listed Observational

Arterial Pressure vs. TE Echo dp/dt

NCT04726852
View directory record Official record
Conditions
Myocardial Contraction
Interventions
Concurrent comparison
Device
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years and older
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Sep 17, 2025 · Synced Sep 10, 2026, 3:30 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Accuracy and Reliability of Fetal Heart Rate and Uterine Contraction Monitoring Method

NCT01280357
View directory record Official record
Conditions
Pregnancy; Habitual Aborter, Weeks of Gestation 37 or More
Interventions
Monica AN24 (K101081), Philips 50XM
Device
Lead sponsor
Monica Healthcare Ltd
Industry
Eligibility
15 Years to 40 Years · Female only
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010
U.S. locations
2
States / cities
New York, New York • Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 20, 2013 · Synced Sep 10, 2026, 3:30 PM EDT