View clinical trials related to Constriction, Pathologic.
Filter by:The purpose of this study is to evaluate the potential benefit of systematic preoperative coronary angiography followed by selective coronary artery revascularization on the incidence of myocardial infarction (MI) in patients without a history of coronary artery disease (CAD) and undergoing carotid endarterectomy (CEA).
Spinal stenosis is one of the most common causes of low back pain among older adults and can result in significant disability. Despite this, it still isn't known which treatments are most effective or what outcomes are most important to these older adults. Through a Patient Centered Outcomes Research Institute (PCORI) contract, the investigators are building on the existing infrastructure of an AHRQ-funded (ARRA CHOICE award) comparative effectiveness research (CER) trial of epidural steroid injections (ESI) for spinal stenosis (the LESS trial) to address several critical research questions. The proposed study will answer the following key questions. Do decision aids tailored to older adults with spinal stenosis change patient decision-making regarding subsequent treatments? Do patients respond differently at subsequent outcome assessments time-points after receiving tailored decision aids that contain their own individual outcome data from prior treatments? The investigators hypothesize that providing these individualized reports will allow patients to make more informed choices regarding subsequent treatments, leading to reduced use of ineffective treatments and improved outcomes overall.
The purpose of the present study is to evaluate the effectiveness of a prehabilitation program on the recovery of patients undergoing a minimally invasive surgery for degenerative lumbar spinal stenosis. To do so, 40 participants will be recruited and randomized into two groups; intervention or control group. Participants in the intervention group will take part in a physical training program, three times a week for six weeks before undergoing surgery. The exercise program will be supervised and will aim at improving core muscles strength and endurance as well as spine stability. It is hypothesized that the prehabilitation program will significantly improve disability and pain intensity reported by patients after surgery. Ultimately, this study aims to improve health care of patients awaiting lumbar surgery but its results may also impact the management of patients awaiting spine surgery for various conditions.
To evaluate a new endoscopic technique for lumbar spinal canal decompression.
First-in-Human clinical investigation to evaluate the safety and clinical performance of the BIOVALVE prosthesis in subjects presenting with severe symptomatic aortic valve stenosis, which are as judged by the heart team, indicated for transfemoral transcatheter aortic valve implantation
The purpose of this study is to narrow the gap between patients being diagnosed with severe aortic stenosis and those being appropriately monitored and treated. For this purpose a prospective survey of current practice (3 months) will be conducted followed by a six month period of intervention during which a variety of quality improvements measures will be implemented. There will then be a 3 month follow-up period during which the legacy of this initiative will be monitored during which no intervention will be carried out.
Aortic stenosis is the most common valvular heart disease and an important public-health problem. Surgical or interventional aortic valve replacement are based on symptoms and measures of valvular and ventricular function using echocardiography.There is no uniform pattern of progression. Instead, marked differences not only between individuals, but also during the time course of the disease can be observed. Several prospective studies have been performed to enhance the predictability of disease behavior. Individually it is still prone to large errors and hard to predict aortic stenosis progression. Therefore, in patients with aortic sclerosis without severe stenosis, it is desirable to find a strong predictor of rapid disease progression. This would allow anticipating cardiovascular deterioration by identifying individuals at particular risk. Study Hypothesis In patients with aortic sclerosis, increased serum calcification propensity, as measured by the T50-Test, is related to the amount of stenosis progression in one year.
The ABSORB III PK sub-study is a prospective, open-label, non-blinded study enrolling approximately 12 subjects in up to 5 US sites. ABSORB III PK sub-study is a part of ABSORB III RCT (NCT01751906). The objective is to determine the pharmacokinetics of everolimus delivered by the Absorb BVS in a separate and non-randomized cohort of subjects who only receive Absorb BVS with a maximum of two de novo native coronary artery lesions after implantation of the Absorb BVS. Note: The ABSORB III PK subjects will not contribute to the determination of the ABSORB III RCT primary endpoint.
The PREHAB study is a clinical trial where frail patients waiting for heart surgery are randomly chosen to either receive the current standard of care or to participate in an 8-week exercise/education program at a community-based cardiac rehabilitation facility. Patients can wait for elective heart surgery for as long as 3-4 months. During this time, individuals are often fearful of making things worse, causing them to stop being active and further deteriorate their physical condition. This wait period presents a potential opportunity for health care providers to engage the patient to take control of their self-managed care prior to surgery with the intent of improving post-surgical outcomes. Patients randomized to the PREHAB intervention group will participate in supervised exercise twice per week in a program designed to improve physical functioning and exercise capacity. The investigators hypothesize that the PREHAB program for frail elderly patients awaiting an elective cardiac surgery will reduce frailty, improve exercise capacity, improve physical activity behaviour, improve in-hospital outcomes, improve clinical outcomes 3 months and 1 year postoperatively, and improve overall quality of life.
Microparticles are small cell fragments that can induce fat plaques, calcification and formation of thrombus. They can be released through multiple stimulations, but also the high flow of blood through partially obstructed aortic valves. In patients with severely obstructed aortic valves the investigators hypothesize that microparticles levels will be elevated and that they will go down after percutaneous treatment of the valves.