View clinical trials related to Aortic Valve Stenosis.
Filter by:Prospective, randomized, stratified non blinded multi-center, international, post market trial assessed in a non-inferiority study. The trial has a flexible sample size that will be determined adaptively. The trial will enroll up to 1234 subjects, but accrual may stop earlier at approximately 900 or 1050 subjects These subjects will be enrolled at approximately 60 worldwide investigational sites where the device is commercially available The primary objective of this trial is to test the safety and efficacy of Perceval versus standard sutured stented bioprosthetic aortic valves among the intended trial population.
Prospective, non-randomized, multicenter post-approval study to collect long term clinical and echographic data on Mitroflow DL patients.
The objective of this study is to evaluate the safety and effectiveness of the Lotus™ Valve System and LOTUS Edge™ Valve System for transcatheter aortic valve replacement (TAVR) in symptomatic subjects with calcific, severe native aortic stenosis who are considered at extreme or high risk for surgical valve replacement.
The purpose of this study is to determine whether intra- and postoperative use of the cardioPAT® cell saver decreases the need for allogenic red blood cell transfusion in patients, who undergo open heart surgery (with cardiopulmonary bypass) and preoperatively have an increased risk for bleeding.
The overall objective of this proposal is to examine the feasibility and accuracy of non-contrast magnetic resonance angiography (MRA) to comprehensively evaluate individuals referred for transcatheter aortic valve implantation (TAVI).
The purpose of this study is to investigate whether mutations in genes coding for Na/Pi-cotransporters are associated with aortic valve calcification. A patient population with premature aortic valve calcification treated with aortic valve replacement will be screened for mutations in these specific genes. Furthermore, aortic valve tissue received from the operations, will be examined for the presence of Na/Pi-cotransporters, and for molecular characterization of the transporters.
To assess if the non use of heparin sodium during balloon aortic valvuloplasty reduces serious complications due to the procedure, by decreasing the rate of vascular and hemorrhagic complications without increasing the rate of ischeamic events.
To demonstrate the safety and effectiveness of the Perceval S heart valve when used to replace a diseased or dysfunctional aortic valve or aortic valve prosthesis.
This was a prospective, non-randomized, multi-center, non-interventional post-market study. The study was a post-market long-term follow-up study based on the same cohort of patients (148 patients) enrolled in a previous investigational study from March 2007 to December 2009 (ATS 3f Enable™ Aortic Bioprosthesis Model 6000, number S2005) involving 10 European sites. Patient follow-up took place on a yearly basis up to 10 years after the implant/enrollment. The primary objective of this study was to evaluate the safety and effectiveness of the Medtronic ATS Enable Aortic Bioprosthesis during long-term follow-up. As this was an observational study, safety and efficacy data were summarized and described. There was no statistically powered study hypothesis.
Aortic stenosis has been thought to be a degenerative process basically induced by long-lasting mechanical stress, and hemodynamic factors such as shear forces, acceleration of blood flow, hypertension and rapid heart rate might contribute to progression of aortic stenosis. Peak aortic jet velocity is known to be associated with clinical outcomes in mild and moderate AS, and our previous study showed that rate of progression was significantly associated with baseline aortic jet velocity in mild aortic stenosis. Because beta-blocker therapy would decrease aortic jet velocity and heart rate, it might decrease hemodynamic stress and eventually slow down the degenerative process in patients whose disease is not too advanced for therapy to be effective. The investigators hypothesized that a beta-blocker therapy would decrease the rate of progression of aortic stenosis by modifying hemodynamic factors favorably in patients with mild to moderate aortic stenosis.