Active clinical trials for "Constriction, Pathologic"

For fetuses with severe aortic stenosis, in utero balloon aortic valvuloplasty may improve fetal growth of left heart structures and thus improve potential for biventricular repair strategies after birth.

A Randomized, Blinded Comparison of Surgical Intervention with the Coflex® Interspinous Implant versus Surgical Decompression for Patients with Intermittent Neurogenic Claudication caused by Lumbar Stenosis

Endoscopic treatment of benign biliary strictures can be challenging. Balloon dilation and/or plastic stent placement are currently the most popular techniques. Partially covered self-expandable metallic stents have also shown to be effective but can be difficult to remove. A novel fully covered metallic stent has recently been developed. The aim of this study was to prospectively evaluate the placement of fully covered self-expandable metallic stents (FCSEMS) in this setting.

The purpose of this study is to assess the safety and effectiveness of the SJM Portico Transcatheter Heart Valve and the SJM TAVI Transfemoral Transcatheter delivery system in subjects with severe symptomatic aortic stenosis (AS).

The purpose of this of this study is to compare the use of Self Expanding Metal Stents (SEMS) to plastic stents for the treatment of benign biliary strictures secondary to chronic pancreatitis as it pertains to stricture resolution rates, complication rates and number of endoscopic retrograde cholangiopancreatography (ERCP) procedures during 24 months. Statistical testing will be performed to determine if the rate of stricture resolution for the metal stent is non-inferior to the plastic stent group.

BACKGROUND: Lumbar spinal stenosis - known by patients as "arthritis of the spine" - is a condition that is very common; found in about 30% of older adults. It is the most common reason for people over the age of 65 to have back surgery. Some patients with stenosis do not need back surgery and can be treated with other methods, such as physical therapy, chiropractic, exercise, and medication. But we just don't have enough good research to tell us which treatment works best for which patient and under which circumstances. This research study hopes to provide more information about the effectiveness of the various non-surgical choices for managing stenosis. OBJECTIVES: This study will directly compare the effectiveness of three common non-surgical treatment approaches for stenosis: Medical care that involves prescription medications and/or spinal injections (epidurals) Group exercise in supervised classes given in a community center setting Hands-on (manual) therapy and rehabilitative exercises given in a clinic setting by physical therapists and chiropractors METHODS: This research study will involve 259 adults who are at least 60 years old and have been diagnosed with lumbar spinal stenosis. The research volunteers will be divided into three groups, each group receiving one of the 3 types of treatments listed above under "Objectives". The determination of which type of treatment each person receives will be determined by chance, using a computerized version of flipping a coin. This is a process known as randomization, which scientists think reduces the bias in research studies. A series of tests and questionnaires will be given to the patients before and after they get treatment and comparisons will be made to see how much improvement they made with each of the types of treatments. Finally, the researchers will compare the differences between the 3 treatment groups to see if certain types of treatment produced better results than others, and if there were any examination findings that could be used to predict which type of patient would do better with which type of treatment.

The purpose of this trial is to test how well the iCAST™ RX Stent works in patients diagnosed with atherosclerotic renal artery stenosis and whether or not increased blood flow by the stent will help to control blood pressure.

The primary objective of the present trial is to demonstrate the safety and effectiveness of the MDT-2111 in the treatment of symptomatic severe aortic stenosis in subjects with small aortic annuli and deemed difficult for surgical operation.

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.