Active clinical trials for "Peripheral Arterial Disease"

The objective of this clinical investigation is to evaluate puncture site complication rate as well as the short- and long-term (up to 24 months) outcome of treatment by means of Astron Pulsar / Astron Pulsar-18 stent implantation in symptomatic (Rutherford 2-4) femoro-popliteal arterial stenotic or occlusive lesions, using 4F compatible devices of BIOTRONIK and without the use of a closure device. The hypothesis is that the primary patency at 12 months is non-inferior to the primary patency obtained in the Durability study (72.2%).

The goal of this study is to develop advances in cardiovascular diagnostic and treatment methods using magnetic resonance imaging (MRI), a test that uses a strong magnetic field and radio waves to show anatomic detail. For the scan, the patient lies on a table in a cylinder containing a magnetic field. He or she can communicate with a staff member at all times during the procedure. Patients 18 years of age or older who require 1) catheterization of the leg arteries for diagnosis or treatment of blocked arteries, or 2) heart catheterization for diagnosis or treatment of coronary artery disease or other heart problems may be eligible for this study. Participants will undergo one of the following procedures: Blood Flow Measurement Using Standard Techniques and MRI For patients with blockage in a leg artery, blood flow will be measured before and after successful catheter-based treatment (angioplasty or stenting) using standard venous occlusion plethysmography and a newer MRI technique. (Patients whose treatment is not successful will not undergo follow-up blood flow measurements in this study.) For venous occlusion plethysmography, a large pressure cuff is placed around the upper or lower legs. Thin elastic bands called a strain gauge are placed around the calves to measure blood blow to the legs. The pressure cuffs are inflated for 5 minutes, preventing blood from flowing to the legs, and are then deflated, allowing the blood to rush to the legs. A smaller cuff is inflated to a low pressure, and the strain gauge measures this maximum blood flow to the legs for 1 or 2 more minutes. For the new MRI technique, blood flow is measured while the patient is in the MRI scanner. Flow is first measured with the patient at rest. Then, the large pressure cuff is inflated for 5 minutes. The cuff is deflated and additional images are taken. Before the cuff is deflated, a dye called gadolinium contrast is injected into an arm vein to brighten the images. Patients may undergo six to eight cuff inflations on four to six different days. Fusion of X-Ray and MRI Images of Peripheral Arteries For patients with blockage in a leg artery Participants will undergo catheterization and MRI of the legs. Special plastic beads are taped to the leg(s) to help compare the MRI and x-ray pictures. For the catheterization procedure, x-rays of the blood vessels are taken to guide placement of the catheters. Contrast dye is injected to brighten the images of the blood vessels. These injections work well in normal and partly blocked arteries, but not in arteries that are completely blocked. For this study, patients first have an MRI scan of their legs. During the scan, gadolinium contrast dye is injected into an arm vein. Then, during the catheterization procedure, a computer aligns the MRI pictures with the x-ray pictures to see if the combined images allow the doctor to better see where to place the catheters. Fusion of X-ray and MRI Images of the Heart For patients undergoing heart catheterization will undergo MRI and heart catheterization. Special plastic beads are taped to the chest to help compare the MRI and x-ray pictures. Patients first have an MRI scan of their heart. During the scan, gadolinium contrast dye is injected into an arm vein. Then, during the catheterization procedure, a computer aligns the MRI pictures with the x-ray pictures to see if the combined images allow the doctor to learn more about the pattern of heart disease. Heart rhythm, blood pressure, heart function, and breathing will be monitored during all the MRIs.

The objective of this study is to evaluate the benefits of participating for 8 weeks in a home-based daily treatment with heat therapy (HT) or a thermoneutral control intervention, as assessed by vascular function, walking tolerance and quality of life.

The objective of this observational registry is to track the clinical progression of chronic limb-threatening ischemia (CLTI) and incidence of death, amputation, and revascularization attempts over a one-year period.

Forty patients of both sexes, aged between 50 and 60 years, were chosen from an outpatient vascular clinic in the El Sahel Education Hospital. Patients have been examined and referred to by a vascular specialist.

A randomised controlled trial evaluating the feasibility and acceptability of a 12 week lower body blood flow restricted resistance exercise programme for people with peripheral arterial disease.

This study aims to evaluate the comparative risk of dementia/Alzheimer's disease onset between patients treated with medications that target specific metabolic pathways and patients treated with alternative medications for the same indication.

Investigators hypothesize that high-dose n-3 polyunsaturated fatty acids (PUFA) oral supplementation will improve systemic inflammation, vascular function, and symptomatic status of patients with PAD. Investigators will explore novel mechanistic pathways by which n-3 PUFA affect PAD, evaluating the role of specialized lipid mediators involved in the resolution of inflammation.

The hypothesis of this proposal is that in subjects with PAD, regular consumption of a high nitrate supplement which raises plasma nitrite, in conjunction with 12 weeks of supervised exercise training at the limb ischemic threshold (SET) will produce a greater clinical benefit (increases in COT and PWT) than placebo plus supervised exercise at the limb ischemic threshold (PET).

Several studies have shown that stenting of the femoropopliteal artery in the lower leg leads to improved overall results compared to balloon angioplasty alone. However, scar tissue development can occur within the stent, a process called restenosis. Treatment of these in-stent restenotic lesions has a high procedural success rate but recurrence of scar tissue is frequently seen. Several methods have been proposed to treat in-stent restenosis in the lower leg arteries but mixed results have been noted. In this study we hypothesize that simultaneous tissue excision and aspiration using the JetStream Navitus device (Medrad) can lead to a high rate of acute procedural success with low intraprocedural complications and an acceptable recurrence rate of restenosis at 6-month follow-up.