View clinical trials related to Aortic Valve Stenosis.
Filter by:As there are no clinical data in cardiology about the relationship between metabolism collagen changes and their clinical significance, the investigators will check the hypothesis that collagen metabolism changes, detected by biochemical markers for collagen metabolism, could predict the left ventricle remodelling and prognosis in patient with clinically significant pressure overloaded left ventricle.
The purpose of this study is to further evaluate the long-term safety and effectiveness of the Biocor and Biocor Supra Valves.
Prospective, two academic center, non-randomized pilot, acute in-patient study correlating pre-operative imaging studies, intra-operative measurements and intra-operative balloon aortic valvuloplasty (BAV) in patients with degenerative aortic stenosis undergoing surgical aortic valve replacement (SAVR) to understand the requirements (device size and radial strength) of emerging percutaneous heart valve technologies in the treatment of aortic stenosis.
To confirm the clinical safety and effectiveness of the Trifecta valve.
The purpose of this study is to confirm the clinical safety and effectiveness of the Trifecta valve.
This study is looking at the effects of high spinal anesthesia (also known as total spinal anesthesia) combined with general anesthesia versus general anesthesia alone on the following: Stress response: Patients undergoing aortic valve replacement surgery have a large incision and a complex operation where they must be placed on the heart-lung machine. The body reacts to the heart-lung machine, increasing the stress response. High spinal anesthesia using local anesthetics when combined with general anesthesia has been shown to block some of the stress response to surgery and the response to the heart-lung machine. This study will examine if blood levels of stress hormones and also inflammatory mediators can be lowered with the use of high spinal anesthesia. Heart function: High spinal anesthesia in combination with general anesthesia may help the heart work better when there is a narrowed valve (aortic stenosis). The heart may also have improved ability to pump blood with this anesthetic technique. Lung function and post-operative pain control: After surgery, patients often have pain which prevents them from taking deep breaths and coughing. This can lead to pneumonia. This study will also examine if the post-operative pain relief provided by spinal morphine (given together with the spinal anesthetic) can provide any better pain control following surgery. By doing this, we want to see if patients can take bigger breaths after their surgery when spinal morphine is used, and try to prevent the complications that occur if patients are not able to breath deeply after surgery.
Symptomatic cerebral infarction following cardiac catheterization is rare but silent brain injury could occur at an unexpectedly high rate. One study has found that up to 22% of patients with severe aortic stenosis who have undergone retrograde catheterization of the valve can be identified as having new ischemic lesions as detected by diffusion-weighted (DW) magnetic resonance imaging (MRI). During cardiac catheterization, cerebral microembolism as detected by TCD has frequently been observed, but whether it is clinically relevant remains unknown . However, recent studies have suggested that some of these microemboli could be responsible for acute brain injury, as documented by DW MRI. Indeed the high sensitivity of DW MRI suggests that this technique could allow an improved estimate of cerebral ischemic events associated with cardiovascular-catheter procedures. We therefore decided to perform DW MRI before and after cardiac catheterization to prospectively assess both clinically silent and apparent cerebral embolisms for the first time in a multicenter trial. Furthermore, a randomization between radial and femoral access will allow assessment of risk of silent brain injury associated with the different vascular access sites.
The purpose of this study is to obtain data regarding the left ventricular mass (LVM) regression 6 months after the implant of an SJM Epic™ and SJM Epic™ Supra valve by comparing LVM regression measured with magnetic resonance imaging (MRI) to LVM regression measured with echocardiography (2-dimensional [2D] mandatory; 3-dimensional [3D] in sites where the technology is available).
The purpose of this study is to evaluate whether treatment with an investigational drug as compared to placebo will reduce the risk of major cardiovascular events in patients with aortic stenosis.
To use a new statistical method, the Logical Analysis of Data (LAD), to predict cardiac surgery risk.