Clinical trials: Vascular Dilation
Internal Mammary Artery Syndrome, Vasodilation
Effect of Topically-applied Milrinone or Nitroglycerin on Internal Mammary Artery Free Flow
Forty-six consecutive patients undergoing elective primary coronary artery bypass grafting were enrolled. After the left IMA was harvested, free flow was measured under controlled hemodynamic conditions before any intervention…
- Trial name
- NCT06301880
- Testing
- The topical application of a vasodilator on the LIMA graft
- Where
- Syria
- Volunteers
- 46 people, healthy volunteers welcome
- Sponsor
- Damascus University
Cystic Fibrosis
Longitudinal Assessment of Exercise Capacity and Vascular Function in Patients With CF
This project is an attempt to understand how Orkambi treatment affects exercise capacity and the function of the arteries in CF patients who are homozygous F508del.
- Trial name
- NCT03338595
- Where
- United States
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- Augusta University
Nitric Oxide, Endothelium-Derived Relaxing Factor
Effects of Nitrite on Blood Vessel Dilation in Normal Volunteers
Nitric oxide gas is important in regulating blood vessel dilation, and consequently, blood flow. This gas is continuously produced by endothelial cells, which line the blood vessels.
- Conditions
- Nitric Oxide, Endothelium-Derived Relaxing Factor, Healthy
- Trial name
- NCT00048477
- Testing
- L-NMMA and Sodium Nitrite
- Where
- United States
- Volunteers
- 42 people, healthy volunteers welcome
- Sponsor
- National Heart, Lung, and Blood Institute (NHLBI)
Hypertension, Left Ventricular Hypertrophy
Pediatric Hypertension and the Renin-Angiotensin SystEm (PHRASE)
Studying the causal roles of components of the renin-angiotensin-aldosterone system (including angiotensin-(1-7) (Ang-(1-7)), angiotensin-converting enzyme 2 (ACE2), Ang II, and ACE), uric acid, and klotho in pediatric…
- Conditions
- Hypertension, Left Ventricular Hypertrophy, Left Ventricular Dysfunction, Left Atrial Dilatation
- Trial name
- PHRASE (NCT04752293)
- Where
- United States
- Volunteers
- 125 people, healthy volunteers welcome
- Sponsor
- Wake Forest University Health Sciences
Healthy, Hypercholesterolemia
Study of the Response of Human Small Blood Vessels
A layer of cells called the endothelium line the walls of blood vessels. These cells produce substances that control the tone of blood vessels and thus control blood flow through the vessel.
- Conditions
- Healthy, Hypercholesterolemia, Hypertension
- Trial name
- NCT00001622
- Testing
- investigate the relationship between in vivo and in vitro vascular responses
- Where
- United States
- Volunteers
- 87 people, healthy volunteers welcome
- Sponsor
- National Heart, Lung, and Blood Institute (NHLBI)
Heart Disease, Heart Failure
Investigating Systemic and Local Vascular Responses to Apelin in the Context of Renin-angiotensin Upregulation
The apelin-APJ system is a relatively new discovery. It has generated interest in part due to it's apparent ability to counteract the renin-angiotensin system, which is frequently overactive in many cardiovascular disease.
- Conditions
- Heart Disease, Heart Failure, Vasodilatation
- Trial name
- NCT00901719
- Testing
- Apelin, Acetylcholine, Sodium nitroprusside
- Where
- United Kingdom
- Volunteers
- 12 people, healthy volunteers welcome
- Sponsor
- University of Edinburgh
Healthy
The Effect of Lopinavir/Ritonavir on Endothelial Function
This study will examine how the anti-HIV protease inhibitor lopinavir/ritonavir (Kaletra® (Registered Trademark)) affects the function of the endothelium (lining of the arteries).
- Trial name
- NCT00076414
- Testing
- Acetylcholine, L-NMMA
- Where
- United States
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- National Institutes of Health Clinical Center (CC)
Diabetes Mellitus, Healthy
Vascular Effects of Endothelium-Derived Versus Hemoglobin-Transported Nitric Oxide in Healthy Subjects
Nitric oxide (NO) is a soluble gas, continuously synthesized by the endothelium, that contributes importantly to vasodilator tone of the coronary and systemic circulations by activating guanylyl cyclase in vascular smooth muscle…
- Conditions
- Diabetes Mellitus, Healthy, Hypercholesterolemia, Hypertension
- Trial name
- NCT00001963
- Testing
- hemoglobin-transported nitric oxide
- Where
- United States
- Volunteers
- 28 people, healthy volunteers welcome
- Sponsor
- National Heart, Lung, and Blood Institute (NHLBI)
Endothelial Dysfunction, Obesity
Leptin Infusion and Endothelial Vasomotor Response
Adipose tissue is an active endocrine organ producing several hormones with circulatory and metabolic effects. In 1994, the hormone leptin was discovered.
- Conditions
- Endothelial Dysfunction, Obesity, Vasodilation, Venous Occlusion Plethysmography
- Trial name
- LIVARM (NCT04374500)
- Testing
- Leptin infusion plus vasodilators in healthy men, Leptin infusion in healthy men, Vasodilators in CAD patients
- Where
- 2 sites in Sweden, United Kingdom
- Volunteers
- 103 people, healthy volunteers welcome
- Sponsor
- Stefan Soderberg
Insulin Sensitivity, Flow-mediated Dilation
Vitamin D, Insulin Sensitivity, and Vascular Associations in Adolescents
The overall objectives of this study are to examine the relationships between circulating vitamin D, insulin sensitivity, and multiple indices of vascular function and to examine whether vitamin D deficiency in AA is responsible…
- Conditions
- Insulin Sensitivity, Flow-mediated Dilation, Arterial Stiffness
- Trial name
- DIVA (NCT01041365)
- Where
- United States
- Volunteers
- 62 people, healthy volunteers welcome
- Sponsor
- University of Alabama at Birmingham
Cystic Fibrosis
Mechanisms for Vascular Dysfunction and Exercise Tolerance in CF
Cystic fibrosis has many health consequences. A reduction in the ability to perform exercise in patients with CF is related to greater death rates, steeper decline in lung function, and more frequent lung infections.
- Trial name
- CF-AOX (NCT02690064)
- Testing
- Acute Antioxidant, Chronic Antioxidant
- Where
- United States
- Volunteers
- 13 people, healthy volunteers welcome
- Sponsor
- Augusta University
Diabetic Nephropathy, Endothelial Dysfunction
Flavonoids in the Treatment of Endothelial Dysfunction in Children With Diabetes
Diabetes is the most common metabolic disease of childhood. Vascular disease is a leading complication of diabetes, and attempts to maintain close glycemic control do not prevent the sequelae that claim the lives and quality of…
- Trial name
- flavonoid (NCT01307917)
- Testing
- flavonoids
- Where
- United States
- Volunteers
- healthy volunteers welcome
- Sponsor
- Texas Tech University Health Sciences Center
Cerebrovascular Accident, Fabry Disease
Vasodilation in Patients With Fabry's Disease
Fabry's disease a genetic disorder (X-linked recessive) due to the absence of the enzyme alpha-galactosidase A. The disease is characterized by abnormal collections of glycolipids in cells (histiocytes) within blood vessel walls…
- Conditions
- Cerebrovascular Accident, Fabry Disease, Healthy
- Trial name
- NCT00001774
- Where
- United States
- Volunteers
- 48 people, healthy volunteers welcome
- Sponsor
- National Institute of Neurological Disorders and Stroke (NINDS)
Hypercholesterolemia, Hypertension
Effects of Rosiglitazone on Blood Vessels in Patients With High Blood Pressure and High Cholesterol
Cells in the lining of blood vessels produce various substances that cause the vessels to dilate (relax) and constrict (tighten), thereby regulating blood flow.
- Trial name
- NCT00006071
- Where
- United States
- Volunteers
- 120 people, healthy volunteers welcome
- Sponsor
- National Heart, Lung, and Blood Institute (NHLBI)
Ventricular Function, Left
Assessment of Cardiac Involvement of Common Cold in High Performing Athletes by Cardiac Magnetic Resonance Imaging (MRI)
Cardiovascular magnetic resonance (CMR) imaging will be used to assess the impact of common colds and physical training in high-performing athletes. Healthy individuals from the general public will serve as a comparison group.
- Trial name
- NCT00739895
- Testing
- Cardiac magnetic Resonance study, Blood testing
- Where
- Canada
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- University of Calgary
Atrial Fibrillation, Endothelial Function
A Case Control Study to Investigate the Possible Association Between Atrial Fibrillation and Endothelium Dysfunction by Using Flow-Mediated Vasodilation Method
Endothelial function is closely related to the hemostasis , vascular tone, and organ perfusion in cardiovascular system, and its dysfunction would cause overactivation of the coagulative system to induce thrombus formation.
- Trial name
- NCT00173966
- Where
- Taiwan
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- National Taiwan University Hospital
Cardiovascular Risk Factor, Endothelial Dysfunction
Interrupting Sitting With High Intensity Exercise on Vascular Function in Adolescents Before and After a Mixed Meal
This study aims to investigate the effect of interrupting a three hour bout of prolonged sitting with high intensity interval exercise on lower limb blood vessel function in adolescents before and after a mixed meal challenge.
- Trial name
- NCT04337385
- Testing
- Interrupting 3 hours of prolonged sitting with high intensity interval exercise, 3 hours of prolonged sitting
- Where
- United Kingdom
- Volunteers
- 6 people, healthy volunteers welcome
- Sponsor
- University of Exeter
MELAS Syndrome
L-arginine Therapy on Endothelium-dependent Vasodilation & Mitochondrial Metabolism in MELAS Syndrome
MELAS patients suffer from exercise intolerance, weakness, poor vision or blindness, poor growth, developmental delay, and deafness.
- Trial name
- NCT01603446
- Testing
- L-Arginine
- Where
- Canada
- Volunteers
- 7 people, healthy volunteers welcome
- Sponsor
- The Hospital for Sick Children
Obesity, Hypertension
Flow-mediated Arterial Dilatation, Hypertension, Endothelin-1 and sICAM-1 in Obese Adolescents
Obesity in adolescents is associated with the development of cardiovascular disease and type 2 diabetes mellitus. In order to detect early development of cardiovascular disease, early detection of the endothelium of obese…
- Conditions
- Obesity, Hypertension, Adolescent Obesity
- Trial name
- sICAM-1 (NCT05951894)
- Where
- Indonesia
- Volunteers
- 70 people, healthy volunteers welcome
- Sponsor
- Universitas Airlangga
Healthy, Dilated Cardiomyopathy
Molecular and Imaging Studies of Cardiovascular Health and Disease
Biobank is a program which collects biological samples, health information and imaging data from consented patients and stored them at the core facility.
- Conditions
- Healthy, Dilated Cardiomyopathy, Hypertrophic Cardiomyopathy, Ischemic Heart Disease
- Trial name
- Biobank (NCT02804269)
- Testing
- Cardiovascular Magnetic Resonance, Fatmass measurement
- Where
- Singapore
- Volunteers
- 5,000 people, healthy volunteers welcome
- Sponsor
- National Heart Centre Singapore