Active clinical trials for "Constriction, Pathologic"

Patients with symptomatic or asymptomatic carotid stenosis in whom carotid artery stenting is planned are randomised between antiplatelet therapy with ticagrelor plus aspirin or clopidogrel plus aspirin and examined with brain MRI before and after stent treatment. The proportion of patients with new ischaemic lesions on MRI after treatment is compared between the two groups.

To determine if cutting balloon angioplasty combined with DEB angioplasty provides a higher primary patency after treatment of recurrent stenoses compared with cutting balloon angioplasty or angioplasty using DEB alone in the venous outflow AVFs. For cutting balloon angioplasty in venous stenosis, the primary patency after 12 months is 55-60% (9,16) and in recurrent stenoses up to 48%(10). We hypothesise that DEB angioplasty after cutting balloon angioplasty leads to improved primary patency at 12 months.

To assess the ability of baseline clinical parameters and imaging modalities to predict short and long term left ventricular function and clinical outcome of subjects with low-gradient, severe aortic stenosis. To assess the impact of aortic valve replacement as compared to medical therapy on clinical outcome of patients with low-gradient, severe aortic stenosis. To assess possible impact of aortic annulus assessment using 3-dimensional imaging modalities on the assessment of AS severity and definition of low gradient severe aortic stenosis.

The current standard of care for benign bile duct strictures involves placement of multiple plastic stents under endoscopic and fluoroscopic guidance to progressively dilate or stretch it open. This approach necessitates multiple procedures which may extend over one year before the stricture is adequately dilated. The investigators propose a study comparing the standard approach of plastic stenting with the use of newer, fully coated metallic stents which are self-expandable, thereby permitting successful dilation of benign bile duct strictures with fewer procedures.

This prospective randomized study included 60 consecutive patients suffering from anal stenosis in the period from April 2002 to December 2008. They admitted to colorectal surgery unit, Mansoura university hospital, Egypt. According to the classification proposed by Milson and Mazier(5), all patients had moderate to severe anal stenosis. There were 43 males and 17 female with a mean age 34 + 5.2 years ranging from 18 up to 63 years.

The aim of the study is to investigate the feasibility of Paclitaxel-eluting PTCA-balloon dilation (SeQuent Please) followed by bare metal stent (Coroflex ) deployment in the main branch (reference diameter: ≥ 2.5 mm and ≤ 3.8 mm, reference diameter of side branch: ≥ 2.0 mm and ≤ 3.5 mm, length of stenoses in either branch ≤ 20 mm) in the treatment of significant (>70%) de-novo-bifurcation stenoses of any Medina classification type in the native left coronary artery as reflected by procedural success and to evaluate the preservation of vessel patency.

The purpose of this study is to evaluate ischemic events and neuropsychological changes after carotid artery angioplasty and stenting with a neuroprotection device.

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.

This study will evaluate real-world outcomes for the SAPIEN 3 Ultra Transcatheter Heart Valve System in transcatheter aortic valve implantation centres that are implementing minimalist periprocedural practices and facilitating early discharge home.

A prospective, controlled, interventional clinical study, includes all patients (16 years) with symptomatic epiphora and diagnosed with grade 1 or grade 2 acquired punctal stenosis. All patients undergo punctal dilatation, canalicular probing and nasolacrimal duct irrigation. Afterwards, patients are divided into two groups: Group A: patients receive only medical treatment in the form of topical 0.05% cyclosporin (Restasis®, Allergan Inc) twice daily for 6 months. Group B: patients receive mini-Monoka stent insertion in the lower canaliculus for 6 months. Outcome measures are changes in Munk scoring, grading of the punctum, functional and anatomical success. Functional success is defined as Munk score 0 to 1. Anatomical success is defined as grade 3 punctum.