Active clinical trials for "Aortic Valve Stenosis"

This study proposes to perform a descriptive analysis and pilot observational study looking at the types and quantity of anesthetic agents used and their associations with outcomes among patients scheduled to receive transfemoral aortic valve replacements (TAVR) at Yale New Haven Hospital (YNHH).

Investigators sought to demonstrate that the increase in the stroke volume during a dobutamine stress echocardiography might impact the prognosis of a patient addressed for a low flow low gradient suspected severe aortic valve stenosis.

The TAVI - Register is a Germany-wide scientific elevation in which data about the aortic valve treatment and the therapeutic consequences are documented.

The development of a high grade AV-block is a frequent complication associated with transcatheter aortic valve implantation (TAVI). Patients who were suitable for TAVI will be enrolled in this study. The HV-interval will be determined before and immediately after implantation. The hypothesis is that a prolonged HV-interval is associated with a high rate of complete AV-block following TAVI.

The SENTINEL Post-Market Registry is a prospective, multi-center, registry using the CE-Marked Sentinel System in subjects with severe symptomatic calcified native aortic valve stenosis indicated for TAVR. Subjects enrolled in the registry will undergo TAVR + Sentinel. Basic demographic information and detailed procedural data will be captured and documented in a registry case report form. All Sentinel filters will be sent for histopathology at an independent core-lab.

Narrowing of the aortic valve in the heart, known as severe aortic stenosis, can impede blood delivery and is associated with poor quality of life and death. In the elderly with considerable medical burden, a relatively new non-invasive valve replacement technique called Transcatheter Aortic Valve Implantation (TAVI) can be used instead of open-heart surgery. However, long term changes in cognition after TAVI remain unclear and previous studies have suggested an increased risk of cognitive decline in patients following the surgical procedure. In this pilot study, the investigators will characterize changes in cognition, physical capacity, overall quality of life and neuropsychiatric symptoms (depression and apathy) over 6 months after TAVI.

Registry study to evaluate the predictive value of a comprehensive geriatric assessment with regard to the outcome of a transcatheter aortic valve Implantation. It will be evaluated which parts of the comprehensive geriatric assessment (CGA) are best suited to predict the therapeutic success of a heart valve Implantation in elderly ( > 80 years) Patient. Possible participants are all Patient of 80 years or above for whom the implantation of a Edwards Sapien XT aortic valve is planned

Aortic stenosis (AS) is the most common valvular heart condition in the United Kingdom and the Western world. Surgery for severe AS prior to symptom onset is controversial. Conventionally changes in valve area and gradient are used to time intervention but myocardial changes may be more predictive of surgical need. This study aims to elucidate the role of diffuse myocardial fibrosis as a prognostic marker, implementing a novel, non-invasive MRI technique to measure it. Design: The investigators will measure diffuse myocardial fibrosis in 150 patients with severe narrowing of the aortic valve before and one year after valve replacement. Expected outcomes: Diffuse myocardial fibrosis measured by MRI scanning will predict outcome after surgery in aortic stenosis. Anticipated Health Benefits: Identify patients with higher post operative morbidity and mortality, who may benefit from earlier valve replacement.

With the upcoming expansion of transcatheter aortic valve replacement (TAVR) indications to younger patients, the feasibility of coronary ostia cannulation beyond different bioprosthesis stent is currently a matter of debate. Purpose of this study is: 1) to assess the feasibility to re-engage coronary ostia after TAVR; 2) to discover potential native anatomical or prosthesis-related features that may preclude proper coronary cannulation after TAVR.

Aortic stenosis (AS), or narrowing of the aortic valve, is the commonest condition requiring valve surgery in the developed world. It is currently not known what determines who will go on to develop symptoms. Exercise testing may be able to identify these patients better than the severity of the narrowing itself, but with some limitations. The purpose of this study is to compare whether MRI scanning or exercise testing can better identify patients with AS who are likely to benefit from surgery. Design: The investigators will measure blood flow to the heart muscle with MRI scanning and perform exercise testing in 170 patients with AS and follow them for up to up to 2 years. Expected outcomes: MRI scanning will more accurately identify those patients with AS who will need surgery during this period. Anticipated Health Benefits: improved selection of patients with AS who are likely to benefit from early surgery. This is likely to reduce deaths in such patients.