View clinical trials related to Aortic Valve Disease.
Filter by:Each type of Aortic valve surgery has its advantages and disadvantages; we aim to differentiate between two types of aortic valve surgery: aortic root replacement (using either Ross procedure or stentless bioprosthesis procedure) and mechanical aortic valve replacement.
There is considerable morbidity and mortality associated with cardiac surgery. Currently little effort is made to quantify how well the immune system of an individual can cope with inflammation or infection to which they are exposed during surgery. The investigators have previously demonstrated that having higher pre-operative antibody levels is associated with a lower risk of infection and a shorter stay in hospital after cardiac surgery. The investigators aim to study 150 patients undergoing aortic valve replacement and explore their dynamic immune responsiveness. The investigators will determine if this response is correlated with the post-operative outcome (development of post-operative infection or increased length of hospital stay). The investigators will compare this response with the previously measured static markers of immune competence and also with a novel device that may give a more rapid measure of dynamic immunity. The investigators will approach patients in the cardiac surgical pre-assessment clinic to see if they are willing to participate in the study. Immediately once under anaesthetic blood will be taken for testing and then again at the end of surgery, 24h after surgery, at discharge from hospital, and at follow-up clinic approximately 4 weeks later. There will be no additional needle insertions on top of those routinely performed. The investigators will collect data from the routine observations as far as 1 year after surgery. If the investigators can show an association between immune function and subsequent post-operative outcome it may be possible to determine ways to improve outcomes for patients undergoing heart surgery. This might include better information on risks and benefits of surgery, actively boosting immune function (vaccination, immune-nutrition), passively improving immunity (administering antibodies), or consider current alternatives to open heart surgery where the threat of infection or inflammation may be markedly reduced (eg trans-catheter aortic valve implantation)
Multicentre prospective registry including consecutive patients undergoing Percutaneous Endovascular Aneurysm Repair (PEVAR), Percutaneous Endovascular Thoracic Aneurysm Repair (PTEVAR) or Transcatheter Aortic Valve Implantation (TAVI) in which variables related to the percutaneous access closure for implanting devices at aorta level will be collected and analyzed. The follow-up period will be 30 days after the procedure. The duration of the recruitment period will be one year. All data will be collected telematically and incorporated into a database for subsequent statistical analysis. There will be 2 points for data interim analysis at 6 and 12 months after initiation of the study.
Overall Goal: To study the outcomes of patients undergoing aortic valve surgeries, different approaches such as standard aortic valve replacement, aortic valve repair, novel techniques as Ozaki's procedure and their subsequent results and complications. - Objective 1: Identify predictors of complications following different types of aortic valve surgery accordingly. - Objective 2: Determine the value of each type in terms of advantages and disadvantages. - Objective3: Assess outcomes such as postoperative life expectancy, hospital stay, prognosis and quality of life.
Previous trials have shown that TAVR was a noninferior alternative to surgery in patients with severe aortic stenosis at intermediate surgical risk. However, patients with congenital bicuspid valve have been excluded in those trials. The purpose of this trial is to determine the safety and effectiveness of TAVR in intermediate-risk patients with bicuspid aortic valve stenosis.
With the aging of Chinese population, degenerative valvular disease is becoming more and more frequent, which has brought a heavy burden to our society. Taking aortic stenosis (AS) as an example, the incidence of AS in population over the age of 65 are about 2%, and in population above the age of 85 can be amounted to 4-8%, in the Western country. Since the invention of transcatheter aortic valve replacement (TAVR),aortic valve disease (AVD),including AS and aortic regurgitation (AR), has attracted more and more attention. To date, there are few data about the prevalence of AVD in China. The characteristics and prognosis of AVD in China are still unknown. Therefore, the investigators design a prospective, observational cohort study to investigate characteristics, treatments and prognosis of AVD in Chinese elderly population. The results of the study will provide a basis for the future national health policy for prevention and treatment of AVD in the elderly.
The objective of this study is to evaluate the safety and effectiveness of the MicroPort's Valve and delivery system for transcatheter aortic valve implantation (TAVI) in severe aortic stenosis who are considered unsuitable for Surgical Valve Replacement.