View clinical trials related to Constriction, Pathologic.
Filter by:The purpose of the study is to determine the proper use of lower back screws and rods (instrumentation) and bony fusion in subjects with one level of degenerative spinal narrowing (stenosis) compressing nerves to the legs with one spinal bone slipping forward on another (spondylolisthesis). There are two types of operations that surgeons perform for this problem. Some spinal surgeons remove some bone in the back (laminectomy) to decompress the nerves. Other surgeons perform a laminectomy (decompression) as above, but feel that it is also important to strengthen the back by placing screws and rods into the spine and adding more bone to obtain a new bridge of bone away from the nerves (decompression with instrumented fusion). This study aims to test the hypothesis that adding instrumented fusion to a decompression for this spinal problem will improve long term patient outcomes.
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.
Lumbar spinal stenosis (a narrowing of spaces in the backbone that results in pressure on the spinal cord and/or nerve roots) is a condition that occurs frequently, particularly in the elderly. This condition can lead to significant pain and limit a person's ability to function. Moreover, doctors disagree about the best way to treat people with lumbar spinal stenosis. In this study we will compare surgical treatment of lumbar spinal stenosis with nonsurgical treatment using physical therapy. The results of this study should help clarify which treatment strategies are the most effective for patients with lumbar spinal stenosis.
OBJECTIVES: I. Identify and characterize the gene causing diaphyseal medullary stenosis with malignant fibrous histiocytoma of the bone. II. Determine the clinical manifestations of this disease in these patients.
To establish a registry in order to collect and analyze baseline and outcome data on patients with severe valvular stenosis treated with balloon valvuloplasty.
To create a registry of all Oregon children undergoing surgical repair of congenital heart disease since 1958 in order to determine mortality, morbidity, and disability after surgery and to assess the safety of pregnancy in women with corrected congenital heart disease and the risk of prematurity and occurrence of congenital heart defects in offspring.
This study tests the effectiveness of different treatments for the three most commonly diagnosed conditions of the lower backbone (lumbar spine). The purpose is to learn which of two commonly prescribed treatments (surgery and nonsurgical therapy) works better for specific types of low back pain. Low back pain is one of the most widely experienced health problems in the United States and the world. It is the second most frequent condition, after the common cold, for which people see a doctor or lose days from work. In this part of the study, we will treat patients with spinal stenosis (a narrowing of spaces in the backbone that results in pressure on the spinal cord and/or nerve roots) with a type of surgery known as posterior decompressive laminectomy or with nonsurgical methods. This study does not cover the cost of treatment.
This study tests the effectiveness of different treatments for the three most commonly diagnosed conditions of the lower backbone (lumbar spine). The purpose is to learn which of two commonly prescribed treatments (surgery and nonsurgical therapy) works better for specific types of low back pain. In this part of the study, we will treat patients with spinal stenosis (a narrowing of spaces in the backbone that results in pressure on the spinal cord and/or nerve roots) caused by degenerative spondylolisthesis (a condition in which one vertebra, or spinal bone, slips forward on another) with either surgery or nonsurgical methods. This study does not cover the cost of treatment.