View clinical trials related to Constriction, Pathologic.
Filter by:The purpose of this study is to assess the effects of rosuvastatin compared to usual care in patients diagnosed with aortic valvular stenosis. Patients must have a diagnosis of mild to moderate aortic stenosis (AS) and no clinical indication for the use of cholesterol lowering agents. A multi-centre, randomized, double-blind, placebo-controlled study, with a two year recruitment period, and a treatment duration of a minimum of 3 years from the time of the last patient randomized to a maximum of 5 years.
Lumbar spinal stenosis (LSS) is a prevalent and disabling condition in the rapidly growing aging population. People with LSS often have a substantial physical and psychosocial burden as well as significant healthcare costs affecting both the individual and society. It has been reported that patients with LSS over the age of 65 are more likely to undergo spinal surgery than any other condition with an estimated total annual inpatient expense of one billion. Individuals undergoing surgical treatment for LSS tend to be older, therefore operative morbidity and mortality are a particular concern. Functional benefit derived from conservative treatment may increase the health and quality of life for individuals suffering from LSS and avoid or delay the need for surgery in some subjects. As the population continues to age, identifying effective non-surgical treatment options for older patients with LSS is an important research priority. Ultimately, the information gained from this study will help fill a significant void in medical literature regarding non-surgical options for this patient population.
This preliminary study will compare the effectiveness of two-dimensional and three-dimensional echocardiographic measurements of wall thickness and left ventricular mass in patients with Aortic Stenosis
Purpose of this study: Primary: • Comparison of cardiovascular mortality and morbidity which includes cardiac and neurological morbidity (TIA and CVA) in the two invasive treatments of asymptomatic carotid artery stenosis Secondary: - Comparison of non cardiovascular morbidity caused by the two invasive techniques 1. morbidity at the site of incision (infection or local hematoma) 2. damage to cranial nerves (hypoglossus, vagus) 3. brain hyperperfusion which is defined as severe headache which is not responsive to analgesics with or without nausea and vomiting. 4. events of bradycardia within the first 24 hours, clinically evident and/or silent - microembolic brain events immediately after the procedure and their relationship with morbidity and/or mortality due to TIA's or CVA's - the change in the stenotic carotid artery at the time of follow up with duplex of neck arteries - the comparison of the affect of the two procedures on patient life style
We sought to determine whether the dual-source computed tomography assessment of aortic valve stenosis and coronary artery disease is equivalent to or even better than conventional invasive coronary angiography and transthoracic echocardiography.
This is a single-center, open label, prospective clinical study to assess the clinical application and functional outcomes of symptomatic patients undergoing the Minimally Invasive Lumbar Decompression (MILD™) treatment for lumbar spinal stenosis. In this study, patient-reported outcomes over a 3 month period following treatment will be collected by the investigator. Periodic surveys for each study subject's pain, functional status, quality of life and physical examination will track outcomes following MILD™ treatment.
The study is a prospective outcome study to evaluate the effectiveness and treatment outcomes of microendoscopic decompressive laminotomy (MEDL) with objective evaluation tools. The patients who fulfill the selection criteria will be enrolled to collect the pre-operative clinical data including demographic data, image studies, and functional evaluation for neurological symptoms and disability. The patient will receive MEDL and post-operative follow-up will be arranged at 1 week, 1 month, 6 months, and 12 months after the operation. All the collected data will be analyzed to evaluate the efficacy and treatment results of MEDL.
This is a a prospective study of the WallFlex™ Biliary Partially-covered Stent designed to collect data to support regulatory clearance by the FDA in the United States and to determine the functionality of the WallFlex™ Biliary Partially Covered Stent as a Palliative treatment for malignant bile duct obstruction.
Renal artery stenosis (RAS) usually refers to a disease of the large extra-renal arterial vessels and most frequently is caused by atherosclerotic obstructions. The prevalence of atherosclerotic RAS increases with age, male gender, traditional cardiovascular risk factors (hypertension, diabetes, smoking, hyperlipidemia) and atherosclerotic comorbidities like coronary artery or peripheral artery disease (PAD). A prevalence up to 40% has been reported in patients with PAD. Undoubtedly, atherosclerotic RAS is a progressive disease, as more than half of the patients exhibit an increasing degree of stenosis within five years after diagnosis, and one out of five patients with a critical stenosis (>60%) suffers renal atrophy and renal failure during this period. RAS may be treated conservatively by so called best medical treatment, surgically, or by endovascular interventions using balloon angioplasty and stenting. The purpose of the investigators study is to determine the incidence and the predictors of RAS in patients with PAD, and to compare the effect of renal artery stenting versus best medical treatment in patients with hypertension and ostial renal artery stenosis in a randomized controlled trial.
It is not clearly understood what causes tracheobronchomalacia (weakening of the windpipe and airways) or tracheal stenosis (narrowing of the windpipe). We plan to take biopsies (small pieces of tissue) and brushings (to collect the cells that form the lining of the airway) from the airways of patients with these diseases and analyze these samples in a laboratory to try and determine the mechanism of disease. We will compare the results with that of patients with normal airways.