7 Clinical Trials for Various Conditions
This was a Phase 2a prospective, single center, randomized, double-blind, placebo-controlled study designed to assess the efficacy, pharmacokinetics, safety and tolerability of IV elamipretide for reduction of reperfusion injury in subjects with Atherosclerotic Renal Artery Stenosis (ARAS), who are undergoing percutaneous transluminal angioplasty of the renal artery (PTRA).
Subjects referred for a routine CTA (computed tomography angiography) or MRA (magnetic resonance angiography) will be invited to participate in the study and subjects will be involved in the study for between 2 and 12 days. Two to three visits to the study doctor will be required. This study will compare the diagnostic results of Gadobutrol enhanced MRA images with MRA images taken without contrast agent using images from a CTA as the standard of reference, which may have been performed up to 60 days prior to enrolment. If a CTA has not been performed in this prior time period, a CTA is required for the study. MRA and CTA images will be collected for an independent review (blinded read).
The purpose of this study is to determine whether the Herculink Elite Renal Stent System is safe and effective in the treatment of renal artery stenosis in patients with less than optimal angioplasty results and uncontrolled hypertension. CAUTION: The Herculink Elite Renal Stent System Is An Investigational Device. Limited by Federal (U.S.) Law to Investigational Use Only.
The purpose of this study is to evaluate the safety and effectiveness of the RX HERCULINK 14 Peripheral Stent System in treating atherosclerotic renal artery stenosis.
This study will use magnetic resonance imaging (MRI) to picture the kidney and renal arteries (arteries that supply blood to the kidney) in patients scheduled for kidney artery angiogram and angioplasty/stenting procedures. An angiogram is a way of taking pictures of arteries that shows areas of narrowing caused by atherosclerosis-a buildup of plaque on the vessel wall. Angioplasty/stent is a treatment procedure in which a balloon-tipped catheter is inserted in the artery and advanced to the area of blockage to open the vessel, increasing blood flow to the kidney. A permanent metal tube (stent) may or may not be put in place to maintain the opening. During either of these invasive procedures, small pieces of plaque can break off and travel in the blood to lodge elsewhere in the body. This is called embolization. Lodged in the kidney, the embolus can impair kidney function. Currently, these emboli cannot be detected. A new way of visualizing the kidneys that allows detection of emboli may reveal whether material has moved to the kidneys and predict if there will be any kidney damage. Patients 21 years of age and older with suspected kidney artery disease scheduled for invasive angiographic evaluation in NIH protocol 95-H-0047 may be eligible for this study. Participants will be assigned to one of two study groups, based on the angiogram findings and the decision to have the angioplasty/stent procedure. Participants in both groups will have baseline MRI scans up to 2 weeks before the invasive procedure (angiogram with or without angioplasty/stent) and again within a day after the procedure. Patients who undergo angioplasty/stent will have another MRI study within about a month following the procedure. MRI uses a magnetic field and radio waves to produce images of body tissues. The patient lies on a table that slides into a large hollow tube (the scanner). During part of the scan, a material called gadolinium contrast may be injected into a vein. This substance brightens the images to better show the kidneys, their blood vessels and blood flow. The procedure lasts from about 1 to 2 hours. During the MRI, the heart is monitored with an electrocardiogram (EKG) and breathing is monitored with a flexible belt. Blood pressure is measured intermittently. The patient can communicate with a staff member at all times. Blood samples will be drawn from an arm vein at the initial clinic visit, within a day after the procedure and about 1 week after the procedure. For patients who had the angioplasty/stent procedure, a third blood sample will be taken within another 6 six weeks. The blood samples will be used to check for changes in kidney function.
This study will compare medical therapy plus stenting of hemodynamically significant renal artery stenoses versus medical therapy alone in patients with systolic hypertension and renal artery stenosis.
The purpose of this trial is to test how well the iCAST™ RX Stent works in patients diagnosed with atherosclerotic renal artery stenosis and whether or not increased blood flow by the stent will help to control blood pressure.