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Vascular Disease clinical trials

View clinical trials related to Vascular Disease.

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NCT ID: NCT05977725 Active, not recruiting - Vascular Disease Clinical Trials

Hand Acceleration Time Assessment With Ultrasound Doppler

HAT
Start date: June 1, 2023
Phase:
Study type: Observational

Chronic upper limb ischemia syndrome is uncommon compared to lower limb ischemia, with several potential causes (e.g., arteriosclerosis, compressive syndromes, arteritis, connective tissue diseases, trauma, and thrombosis). Many patients with upper limb ischemia remain asymptomatic due to arterial collateral vascularization. Given the wide variety of potential causes for upper limb ischemia, the diagnosis may require different technical approaches. Doppler ultrasound is a non-invasive, accessible, non-radiating technique that provides direct arterial imaging, yielding valuable information on arterial anatomy and hemodynamics. Some authors have described the reliability of the arterial duplex ultrasound for lower limb assessment using the pedal acceleration time (PAT). The PAT provides real-time hemodynamic physiological information on the entire limb. The acceleration time (AT) is an ultrasound parameter which measures the time elapsed (in milliseconds, ms) from the beginning of the arterial Doppler waveform until the systolic peak, evaluating the morphology of the arterial waveform in real time. In a healthy individual, this time should be short (between 40 - 100 milliseconds), displaying a triphasic waveform with a systolic acceleration, a sudden diastolic fall, and a subsequent anterograde flow at the end of diastole. A more damped wave suggests proximal stenosis and the acceleration time has been correlated to different degrees of foot ischemia. Notably, the AT parameter has also been studied in other territories, such as the carotid and pulmonary arteries, coronary arteries, and the aorta. Hand acceleration time (HAT) has also been described very recently as a potential tool to assess hemodialysis access-induced ischemia, cardiogenic shock, and subclavian iatrogenic ischemic lesion. However, the HAT has not yet been properly characterized or validated. Our working hypothesis is that the HAT is a useful diagnostic tool for chronic upper limb ischemia.

NCT ID: NCT05654935 Withdrawn - Stroke Clinical Trials

Telerobotic Ultrasound for Carotid Imaging - Feasibility Study

Start date: March 26, 2014
Phase:
Study type: Observational

In this proposal, the investigators will demonstrate the feasibility and noninferiority of telerobotic ultrasonography as compared to traditional manual acquisition in performing a limited carotid Duplex examination and in carotid plaque detection.

NCT ID: NCT02933957 Recruiting - Vascular Disease Clinical Trials

Chinese Arteriosclerosis Series Evaluation-She Minority Study

CASE-SMS
Start date: January 2015
Phase: N/A
Study type: Observational

Traditionally, people have always been focusing on vascular injuries by angiography. Recent years, the investigators have further known that the pathological foundation of various cardiovascular complications not only lies in the vascular lumen, but also vessel wall. Therefore, now it is possible to detect and prevent vascular disease early. There are many influencing factors on functional and structural damages of vessels, including genetic and environmental factors. The investigators have done many researches on populations of the Han nationality, which has the largest population in China. Thus, the investigators further wonder whether the function and structure of vessel differ in the She Minority of a remote southern region in China. The investigators will enroll 150 subjects of two ethnic groups respectively in the local population, namely She Minority and Han nationality. All subjects enrolled into the study will complete a questionnaire survey of the general situation and conduct vascular related examinations, including evaluation of arterial stiffness, arterial elasticity indexes, subclinical carotid atherosclerosis and biomarkers. The investigators will analysis vascular differences between the two populations and provide a theoretical basis for the specific strategies of prevention and treatment.

NCT ID: NCT02931188 Completed - Vascular Disease Clinical Trials

The Effect of Anacetrapib on Vascular Function and Arterial Stiffness

REVEAL-Vasc
Start date: January 2017
Phase:
Study type: Observational

There are currently no studies evaluating the effect of anacetrapib on blood vessel function and stiffness of the arteries. The REVEAL-Vasc trial will assess whether anacetrapib, in addition to atorvastatin (LDL-C lowering drug) treatment, results in greater endothelial-dependent vascular function and aortic stiffness in patients with established cardiovascular disease, compared to adding placebo. Participants will be asked to provide a blood sample and pulse Wave Velocity/Pulse Wave Analysis and Flow Mediated Dilation will be carried out to assess blood vessel function and stiffness of the arteries. REVEAL-Vasc is an investigator led sub-study of HPS3/TIMI 55: REVEAL (Randomized Evaluation of the Effects of Anacetrapib through Lipid modification): A large-scale, randomized placebo-controlled trial of the clinical effects of anacetrapib among people with established vascular disease (NCT01252953) which is coordinated by OXFORD CTSU. No treatment will be received on this sub-study, therefore only participants who have been enrolled in HPS3/TIMI55 REVEAL in which participants received anacetrapib with atorvastatin or placebo will be considered for this trial.

NCT ID: NCT02920125 Completed - Clinical trials for Coronary Artery Disease

Study the Result of Ayurvedic SUVED & Reimmugen (Colostrum) Treatment on Vascular Disease, CAD, CVA, DVT.

SHARP
Start date: January 2016
Phase: Phase 3
Study type: Interventional

To evaluate the benefits of Ayurvedic SUVED & REIMMUGEN Colostrum for reduction/reversal of symptoms and study clinical progress in Vascular disease; CAD, CAV, Stroke, DVT patients.

NCT ID: NCT02863926 Completed - Clinical trials for Peripheral Artery Disease

Use of Autologous Concentrated Bone Marrow Aspirate in Preventing Wound Complications in Below Knee Amputation (BKA)

MarrowCHAMP
Start date: January 6, 2017
Phase: Phase 1
Study type: Interventional

Patients scheduled for major extremity lower amputation to receive bone marrow cells (cBMA) injected IM in the leg proximal to the amputation in the index limb to prevent ischemic wound complications after surgery.

NCT ID: NCT02843854 Not yet recruiting - Clinical trials for Peripheral Artery Disease

Safety and Efficacy of Allogeneic MSCs in Promoting T-regulatory Cells in Patients With Small Abdominal Aortic Aneurysms

VIVAAA
Start date: October 2016
Phase: Phase 1
Study type: Interventional

This study will assess the safety and efficacy of systemic (IV) administration of escalating doses of allogeneic MSCs in modulating immune cell phenotypes and suppressing aortic inflammation in patients with small AAA. Subjects will be randomized in a 1:1:1 fashion to receive mesenchymal stromal cells (1 million or 3 million MSC/kg) intra-venously or placebo (Plasmalyte A).

NCT ID: NCT02831556 Completed - Pregnancy Clinical Trials

Point of Care 3D Ultrasound for Various Applications: A Pilot Study

Start date: July 2016
Phase:
Study type: Observational

Summary 1. Purpose and Objective: The purpose of this study is to test the feasibility of rapid acquisition of point of care 3D ultrasound in obtaining abdominal and/or pelvic images. The study will use a newly developed acquisition method and post-processing technique to create three dimensional image models of the abdomen and/or pelvis. 2. Study activities and population group. The study population will be a convenience sample of patients of any age presenting to the Emergency Department with complaints necessitating a clinical abdominal and/or pelvic imaging. The study intervention includes acquisition of research ultrasound images, which will not be used for clinical care, and comparison of these images with clinically obtained images. Other clinical data such as surgical and pathology reports will also be reviewed. 3.Data analysis and risk/safety issues. This is a pilot study intended to determine feasibility and to refine image reconstruction algorithms. Research images will be compared to clinical images. Comparison of research images with final diagnosis will also occur. The research intervention, an ultrasound exam, has no known safety risks. The only risk to subjects is loss of confidentiality. This study is observational, not interventional, because the experimental ultrasound will be performed in all subjects and will not be used in the clinical care of patients (consequently, will not have the opportunity to affect clinical outcomes). Experimental images will be reviewed after completion of clinical care and will not be provided to the clinicians caring for the subjects. The investigators are not measuring the effect of the ultrasound examination on the subjects' outcomes.

NCT ID: NCT02820233 Recruiting - Heart Failure Clinical Trials

Studies of Neuregulin/ERBB Signaling in Human Heart

Start date: June 2015
Phase:
Study type: Observational

This study examines the role of the epidermal growth factor (EGF) receptor family and the EGF family of ligands in the regulation of non-myocytes isolated from the human heart.

NCT ID: NCT02807779 Active, not recruiting - Clinical trials for Peripheral Artery Disease

Intima Versus Adventitia Drug Delivery to Elucidate Mechanisms of Restenosis: Magnetic Resonance Imaging

INVADER MRI
Start date: February 10, 2016
Phase: Phase 4
Study type: Interventional

This is a prospective, multicenter, randomized trial to determine the mechanisms of vascular healing. The study will evaluate subjects with peripheral artery disease (PAD) who require an endovascular intervention of the femoro-popliteal (SFA) artery to restore blood flow to the leg.