Clinical trials: Variability
Ventilation, Reproducibility
Assessing Variability of the Ventilatory Response to Duffin's Rebreathing Procedure
This study will combine Duffin's rebreathing procedure with additional study procedures, such as quantitative pupillometry, that are planned for subsequent clinical studies in order to confirm feasibility and gather…
- Conditions
- Ventilation, Reproducibility, Physiology
- Trial name
- NCT05168501
- Testing
- Rebreathing procedure
- Where
- United States
- Volunteers
- 7 people, healthy volunteers welcome
- Sponsor
- Food and Drug Administration (FDA)
Vestibular Schwannoma, Inner Ear Disease
Vestibular Precision: Physiology & Pathophysiology
This project will investigate the role of noise in the vestibular system, and in particular its effects on the variability (precision) of vestibular-mediated behaviors.
- Conditions
- Vestibular Schwannoma, Inner Ear Disease, Dizziness, Neurofibromatosis 2
- Trial name
- NCT04890132
- Testing
- VOR precision training
- Where
- United States
- Volunteers
- 90 people, healthy volunteers welcome
- Sponsor
- Massachusetts Eye and Ear Infirmary
Heart Failure
Necklace-Shaped Sensor for Non-Invasive Monitoring of Stroke Volume and Cardiac Output
Study will compare measurements made with Necklace device for stroke volume/cardiac output with values from a FDA-approved reference device. The gold standard that will be used is Cardiac MRI.
- Trial name
- NCT02719301
- Volunteers
- 85 people, healthy volunteers welcome
- Sponsor
- Baxter Healthcare Corporation
Athletic Performance, Aerobic Capacity
Individualized Training to Improve Aerobic Capacity and 2,000 m Rowing Performance in Youth Rowers
The goal of this randomized clinical trial is to learn whether an individualized rowing training program based on ventilatory thresholds can improve aerobic capacity and 2,000 m rowing performance in youth rowers from Valdivia…
- Conditions
- Athletic Performance, Aerobic Capacity, Rowing Performance
- Trial name
- NCT07602244
- Testing
- Individualized Rowing Training, Usual Rowing Training
- Where
- Chile
- Volunteers
- 44 people, healthy volunteers welcome
- Sponsor
- Universidad San Sebastián
Healthy
Genetic Response to Warfarin in Healthy Subjects
The purpose of this study is to determine the importance of genetic differences on individuals' response to warfarin in a group of healthy subjects.
- Trial name
- NCT01520402
- Testing
- Warfarin
- Where
- United States
- Volunteers
- 35 people, healthy volunteers welcome
- Sponsor
- Icahn School of Medicine at Mount Sinai
Functional Voice Disorder, Psychogenic Voice Disorder
Autonomic Dysfunction in Functional Dysphonia
The first objective of this research project is to compare the occurrence and frequency of symptoms and/or disorders related to autonomic dysfunction in patients with functional dysphonia with gender- and age-matched vocally…
- Conditions
- Functional Voice Disorder, Psychogenic Voice Disorder, Muscle Tension Dysphonia
- Trial name
- NCT06100601
- Testing
- ANS regulation therapy, conventional voice therapy (CVT), ANS regulation therapy + CVT
- Where
- Belgium
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- University Ghent
Diabetic Macular Edema
Intra-individual Variability and Circadian Rhythm of VEGF Levels and Interaction With Biomarkers
The study evaluates the intra-individual variability of VEGF levels over a period of 6 months as well as the circadian variation of VEGF levels, both under standardized conditions in patients with type 2 diabetes without DME and…
- Trial name
- NCT02325271
- Testing
- Frequent blood and urine sampling and blood pressure measurement
- Where
- Germany
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- GWT-TUD GmbH
Blood Pressure, Heart Rate Variability
The Cardiovascular Benefits of Reducing Personal Exposure to Air Pollution
Exposure to air pollution is an important risk factor for cardiovascular morbidity and mortality, and is associated with increased blood pressure, reduced heart rate variability, endothelial dysfunction and myocardial ischaemia.
- Trial name
- NCT00809432
- Testing
- Face mask (Dust Respirator), No Face mask
- Where
- China
- Volunteers
- 15 people, healthy volunteers welcome
- Sponsor
- University of Edinburgh
Clexane is Administered to Healthy Volunteers
A Single-Dose Trial to Examine the Within Subject Variability of Clexane® in Healthy Adults Under Fasting Conditions
Primary: To examine the within subject variability of Clexane (80 mg) in healthy male and female volunteers administered subcutaneously (s.c.) as a single dose, in two periods, under fasting conditions.
- Trial name
- NCT02081950
- Testing
- Enoxaparin sodium
- Where
- United Kingdom
- Volunteers
- 14 people, healthy volunteers welcome
- Sponsor
- Chemi S.p.A.
Athletic Performance, Cognitive Fatigue
TCP-600 Supplementation and Performance Response in Professional Football Players
This study will examine whether a 28-day supplementation protocol containing taurine, caffeine, and phosphatidylserine can help professional male football players maintain physical performance, cognitive function…
- Conditions
- Athletic Performance, Cognitive Fatigue, Exercise Recovery, Football-Specific Performance
- Trial name
- TCP600-RESP (NCT07710547)
- Testing
- Taurine, Caffeine, Phosphatidylserine
- Where
- 3 sites in Poland
- Volunteers
- 65 people, healthy volunteers welcome
- Sponsor
- Vizja University in Warsaw
Autonomous Nervous System, Fatigue
Exploring Physiological Responses of Virtual Reality Walking Exercise Versus Treadmill Walking in Healthy Individuals
This study aimed to systematically compare the physiological responses generated by walking exercises conducted in a VR environment versus those performed on a treadmill, with a specific focus on their impacts on the autonomic…
- Trial name
- NCT06679348
- Testing
- walking exercise on treadmill, Treadmill walking exercise using VR
- Where
- Turkey (Türkiye)
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- Atlas University
Hypertension, Autonomic Dysfunction
Autonomic Regulation of Blood Pressure and Heart Rate During Orthostasis and Exercise in Healthy and Hypertensive Individuals
The goal of this observational study is to assess arterial stiffness and autonomic regulation of blood pressure and heart rate in healthy adults and people with arterial hypertension during orthostatic stress and graded physical…
- Conditions
- Hypertension, Autonomic Dysfunction, Orthostatic Hypotension
- Trial name
- NCT07482462
- Where
- Slovenia
- Volunteers
- 120 people, healthy volunteers welcome
- Sponsor
- University Medical Centre Ljubljana
Heart Rate Variability, Sports Accident
Factors and Characteristics of Heart Rate Variability in Runners
The purpose of this study is to describe the variation characteristics and factors of the heart rate variability during long-distance running.
- Trial name
- NCT04909788
- Testing
- a long-distance running (over 3 km)
- Where
- China
- Volunteers
- 520 people, healthy volunteers welcome
- Sponsor
- Huazhong University of Science and Technology
Experimental Pain in Healthy Human Subjects
Intra- and Inter-individual Differences of Pain
Pain is a highly subjective and variable phenomenon. Different persons perceive objectively identical nociceptive stimuli differently.
- Trial name
- NCT05616091
- Testing
- painful stimulation by using a laser device (DEKA Stimul 1340, Calenzano, Italy)
- Where
- Germany
- Volunteers
- 162 people, healthy volunteers welcome
- Sponsor
- Technical University of Munich
Gait Variability; Elders; Fall; Re-education
Effect of Observation Plus Imagination of Gait on Stride Variability in Young and Older Adults
The aim of study is to examine the combined effect of observation and imagination of gait on stride time variability of stride time among in healthy young and older adults.
- Trial name
- OBI (NCT02120144)
- Testing
- Observation & imagination, Reading
- Where
- France
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- University Hospital, Angers
Healthy
Safety and Tolerability of Lu AG06474 in Healthy Young Men
The purpose of this study is to investigate the safety and tolerability of Lu AG06474 and what the body does to Lu AG06474 after swallowing single doses of the drug.
- Trial name
- NCT05003687
- Testing
- Lu AG06474
- Where
- United States
- Volunteers
- 79 people, healthy volunteers welcome
- Sponsor
- H. Lundbeck A/S
Healthy
Gait Variability in Healthy Youngs
Three hundred healthy individuals will be participants of the study. Participants will evaluate with the following assessment tools: Demographic datas; age, gender, height, body mass, will be recorded.
- Trial name
- NCT02988284
- Testing
- No intervention
- Volunteers
- 300 people, healthy volunteers welcome
- Sponsor
- Hacettepe University
Hypotension on Induction
The Role of Left Ventricular Outflow Tract (LVOT) Velocity-time Integral (VTI) and Respiratory Variability at Peak Rate (Vpeak) in Predicting Hypotension After General Anesthesia Induction
Preoperatively, patients will undergo transthoracic echocardiography measurements approximately 15-30 minutes before induction. TTE will be performed on all patients by an experienced observer; the echocardiography device will be…
- Trial name
- LVOT-VTI-hypot (NCT07121699)
- Testing
- Inotrope
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Aydin Adnan Menderes University
Pregnancy Related, Heart Rate Variation (HRV)
Cardiovascular Research in EMbarazo and MAternity (EMMA). Study on Heart Rate Variability and Hemodynamic Adaptations During Pregnancy and Postpartum.
Heart rate variability (HRV) provides a non-invasive assessment of autonomic control of the nervous system over the heart. During pregnancy, the cardiovascular system adapts significantly, affecting HRV and hemodynamics.
- Conditions
- Pregnancy Related, Heart Rate Variation (HRV), Hemodynamics
- Trial name
- EMMA (NCT07376616)
- Testing
- Assessment of HRV and blood pressure
- Where
- Spain
- Volunteers
- 242 people, healthy volunteers welcome
- Sponsor
- Fundacin Biomedica Galicia Sur
Chronic Neck Pain, Autonomic Nervous System
Autonomic Nervous System Dysregulation in People With Chronic Neck Pain
The goal of this observational study is to investigate heart rate variability in different positions and in response to isometric hand-grip test in people with non-specific chronic neck pain as compared with healthy controls.
- Trial name
- NCT06554704
- Testing
- Isometric hand grip test
- Where
- Taiwan
- Volunteers
- 56 people, healthy volunteers welcome
- Sponsor
- National Yang Ming Chiao Tung University