Clinical trials: Microvascular Dysfunction
Hypertension
Effects of Nebivolol on Skeletal Muscle During Exercise in Hypertensive Patients
The purpose of this study is to determine if Nebivolol improves microvascular perfusion in skeletal muscle during exercise in hypertensive patients and whether this improvement is accompanied by reduction in vascular oxidative…
- Trial name
- NCT01501929
- Testing
- Metoprolol succinate, Nebivolol, Non-invasive measurement of Cardiac Output (CO)
- Where
- United States
- Volunteers
- 32 people, healthy volunteers welcome
- Sponsor
- University of Texas Southwestern Medical Center
Hypertension
Neural Mechanism of Aldosterone-induced Insulin Resistance
Patients with high aldosterone hormone have higher blood glucose than normal people. This study is being done to understand how aldosterone hormone affects the nerve activity that controls blood flow in the muscles and blood…
- Trial name
- NCT02102243
- Testing
- DEFINITY® infusion, Human Recombinant Regular Insulin infusion, Dextrose infusion
- Where
- United States
- Volunteers
- healthy volunteers welcome
- Sponsor
- Wanpen Vongpatanasin
Preeclampsia, Microvascular Function
Prenatal Aspirin and Postpartum Vascular Function
Preeclampsia is a pregnancy disorder affecting ~5-10% of pregnancies in the United States. Women who develop preeclampsia during pregnancy are more likely to develop and die of cardiovascular disease later in life, even if they…
- Trial name
- NCT05653973
- Testing
- Acetylcholine, Endothelin-1
- Where
- United States
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Anna Stanhewicz, PhD
Cerebral Microvascular Dysfunction, Cerebral Small Vessel Diseases
PRospective Observation on CErebral microvaScular Structure and Function
This is a population-based prospective cohort study, aiming to assess the prevalence, distributional characteristics, and dynamic change of cerebral small vessel dysfunction in a Chinese community population using advanced…
- Conditions
- Cerebral Microvascular Dysfunction, Cerebral Small Vessel Diseases, Cognitive Dysfunction, Cerebrovascular Disorders
- Trial name
- PROCESS (NCT06579677)
- Testing
- Without any intervention
- Where
- 2 sites in China
- Volunteers
- 3,500 people, healthy volunteers welcome
- Sponsor
- Beijing Tiantan Hospital
Endothelial Dysfunction, Hyperhomocysteinemia
Effects of Oral Supplementation With Creatine on Systemic Microvascular Endothelial Function in Vegetarian Individuals
The present study aims at investigating the effects of the oral supplementation with creatine on the systemic microvascular reactivity and plasma levels of homocysteine in vegetarian individuals of the vegan type.
- Trial name
- NCT02961972
- Testing
- monohydrate and micronized creatine
- Where
- Brazil
- Volunteers
- 49 people, healthy volunteers welcome
- Sponsor
- National Institute of Cardiology, Laranjeiras, Brazil
Diabetes Mellitus, Type 2, Diabetic Cardiomyopathies
CMR in T2DM: The NSR Cohort
This study aims to investigate the myocardial phenotype of patients with type 2 diabetes. From 2016-2019 the investigators recruited a cohort of 296 subjects with type 2 diabetes.
- Conditions
- Diabetes Mellitus, Type 2, Diabetic Cardiomyopathies, Cardiovascular Magnetic Resonance Imaging, Coronary Microvascular Dysfunction
- Trial name
- NCT05915260
- Testing
- All subjects will undergo cardiac magnetic resonance imaging with gadolinium contrast and with adenosine myocardial perfusion
- Where
- Denmark
- Volunteers
- 700 people, healthy volunteers welcome
- Sponsor
- Slagelse Hospital
Child, Only, Obesity
Microvascular Reactivity in Prepubertal Children
This is a cross-sectional study aimed to investigate microvascular reactivity in prepubertal children according to adiposity status.
- Conditions
- Child, Only, Obesity, Endothelial Dysfunction
- Trial name
- MicroChild (NCT03171441)
- Testing
- nailfold videocapillaroscopy, inflammatory biomarkers
- Volunteers
- 98 people, healthy volunteers welcome
- Sponsor
- Rio de Janeiro State University
Coronary Microvascular Disease, Cardiac Pacemaker Syndrome
The Effects of Trans Venous Cardiac Pacing on Coronary Microvascular Function and Hemodynamics
The study will examine role of transvenous pacing on coronary microcirculation.
- Trial name
- NCT03917251
- Testing
- Coronary flow and pressure measurement in patients with ventricular pacing
- Volunteers
- healthy volunteers welcome
- Sponsor
- University of Nebraska
Rheologic Disease, Sickle Cell Disease
Microvascular and Cardiac Dysfunction in Paroxysmal Nocturnal Hemoglobinuria and Sickle Cell Disease
The purpose of this study is to examine how abnormal blood flow in the small vessels (microvessels) of the heart, muscle and kidney in paroxysmal nocturnal hemoglobinuria (PNH) or sickle cell disease leads to poor functioning of…
- Conditions
- Rheologic Disease, Sickle Cell Disease, Paroxysmal Nocturnal Hemoglobinuria
- Trial name
- NCT01294891
- Testing
- Imaging
- Where
- United States
- Volunteers
- 6 people, healthy volunteers welcome
- Sponsor
- Oregon Health and Science University
Healthy
Effects of an Antioxidant Supplement on Blood Vessel Health
Cardiovascular disease (CVD) is a leading cause of morbidity and mortality worldwide, and the non-Hispanic Black (NHB) population is disproportionately affected.
- Trial name
- NCT06424756
- Testing
- MitoQ, MitoTempo, Tempol
- Where
- United States
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- University of Georgia
Arterial Hypertension, Erectile Dysfunction
Effects of Sildenafil on Penile Vascular Function in Hypertensive Men With Erectile Dysfunction
The study will evaluate the effects of a chronic 30-day treatment with sildenafil citrate on penile and systemic microvascular function as well as in blood pressure.
- Trial name
- NCT02620995
- Testing
- sildenafil citrate, comparator group
- Where
- Brazil
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- National Institute of Cardiology, Laranjeiras, Brazil
Syndrome X
Syndrome X and Endothelial Dysfunction
Cardiac syndrome X is characterized by angina, positve stress test, and patent coronary angiography, and its probable mechanism is microvascular dysfunction associated with endothelial dysfunction.
- Trial name
- NCT00190086
- Volunteers
- 28 people, healthy volunteers welcome
- Sponsor
- Far Eastern Memorial Hospital
Microcirculatory Dysfunction, Tissue Hypoperfusion
Submental Tissue Oxygenation and Arterial Lactate in Major Surgery
During major surgical procedures performed under general anesthesia, changes in blood flow and oxygen delivery to tissues may occur due to blood loss, hemodynamic fluctuations, and anesthesia-related physiological effects.
- Conditions
- Microcirculatory Dysfunction, Tissue Hypoperfusion, Microcirculatory Status, Microvascular Circulation
- Trial name
- NCT07399275
- Testing
- No intervention. This is a prospective observational study. Near-infrared spectroscopy measurements are performed for monitoring purposes only and do not influence clinical management.
- Where
- Turkey (Türkiye)
- Volunteers
- 150 people, healthy volunteers welcome
- Sponsor
- Bursa Sevket Yilmaz Training and Research Hospital
Epilepsy (Treatment Refractory), Epilepsy
Retinal OCT Changes and Biomarkers in Drug-Resistant Epilepsy
This prospective, longitudinal observational study investigates whether epilepsy involves a progressive neurodegenerative process.
- Trial name
- NCT07716930
- Where
- Turkey (Türkiye)
- Volunteers
- 250 people, healthy volunteers welcome
- Sponsor
- Kemal Tutkavul
Cardiovascular Disease, Endothelial Dysfunction
Elucidation and Monitoring Postprandial Endothelial Function
The primary aim of this study is to evaluate the effect of a high fat challenge on several measures of endothelial function. The secondary aim of this study is to elucidate the mechanism of postprandial endothelial dysfunction…
- Trial name
- EMPEF (NCT00766623)
- Testing
- high fat meal, control meal
- Where
- Netherlands
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- Wageningen University
Type2 Diabetes, Type 2 Diabetes Mellitus in Obese
Brain Health in Youth With Normal Weight, Overweight and Obesity at Risk for Type 2 Diabetes (T2D)
Investigators propose to study youth across the spectrum of body mass index (BMI) and dysglycemia. This approach will allow investigators to disentangle the relationship of key features of type 2 diabetes (T2D) risk (e.g.
- Conditions
- Type2 Diabetes, Type 2 Diabetes Mellitus in Obese, Dysglycemia, Microvascular Complications
- Trial name
- Metabrain (NCT05277558)
- Testing
- Observational
- Where
- 2 sites in United States
- Volunteers
- 117 people, healthy volunteers welcome
- Sponsor
- Washington University School of Medicine
Myocardial Blood Flow Reserve, Mechanical Dyssynchrony
Mechanical Dyssynchrony and Microvascular Dysfunction by SPECT
The project is aimed at studying the feasibility of mechanical dyssynchrony of the left ventricle of the heart, determined by SPECT (gated MPI), as well as its stress-induced dynamics, in the evaluation of patients with coronary…
- Conditions
- Myocardial Blood Flow Reserve, Mechanical Dyssynchrony, Coronary Arterial Disease (CAD)
- Trial name
- MD&MD (NCT06969547)
- Testing
- dynamic SPECT (two-day rest/stress protocol), gated myocardial perfusion imaging, blood sampling
- Where
- Russia
- Volunteers
- 75 people, healthy volunteers welcome
- Sponsor
- Tomsk National Research Medical Center of the Russian Academy of Sciences
Hypertension, Endothelial Function
Endothelial Extracellular Vesicles as Biomarkers of Endothelial Activation in Adults With Newly Diagnosed Hypertension
Hypertension is associated with endothelial dysfunction, an early event in the development of cardiovascular disease. Endothelial extracellular vesicles (EEVs) have emerged as promising biomarkers of endothelial activation and…
- Trial name
- HYPER-endoEV-a (NCT07728630)
- Where
- Croatia
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- Josip Juraj Strossmayer University of Osijek
Microvascular Coronary Artery Disease, Heart Failure With Reduced Ejection Fraction
CMR Assessment of Cardiac Microvascular Dysfunction in Patients With HFpEF
Heart failure with preserved ejection fraction (HFpEF) causes hospitalizations, premature mortality and high health care costs. This is also due to poor understanding of HFpEF pathogenesis and, thus, lack of specific therapies.
- Trial name
- MAPPED (NCT06316661)
- Testing
- stress perfusion cardiac magnetic resonance, cardiopulmonary exercise test
- Where
- Italy
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Istituto Auxologico Italiano
Hypertension
Hypertension and Retinal Microvascular Dysfunction
Hypertension is a worldwide health care burden that affects the structure and function of the macro- and microcirculation. Non-invasive vascular biomarkers are essential to timely diagnose end organ damage to improve…
- Trial name
- HyperVasc (NCT04763005)
- Testing
- HIIT exercise intervention, Physical activity recommendations
- Where
- Switzerland
- Volunteers
- 85 people, healthy volunteers welcome
- Sponsor
- University of Basel