View clinical trials related to Constriction, Pathologic.
Filter by:In patients with aortic stenosis and low ejection fraction, how can we predict who will recover their ejection fraction after aortic valve replacement? We plan to observe 50 patients with Low EF aortic stenosis and perform serial echocardiograms pre and post-aortic valve replacement and analyze regional wall motion contractility with a new software application called speckle tracking imaging.
The purpose of this trial is to assess whether the Stabilimax NZ® is at least as safe and effective as the control therapy of fusion in patients receiving decompression surgery for the treatment of clinically symptomatic spinal stenosis at one contiguous vertebral levels from L1-S1. Safety and effectiveness will be assessed by means of primary study endpoints which address improvements in pain and function in the absence of major device related complications. The study hypothesis criteria for demonstrating safety and efficacy requires scientific evidence that patients classified as satisfying the primary study endpoint post device implantation is at least as good for Stabilimax NZ® recipients as that for patients undergoing fusion with posterior pedicle screw instrumentation at the 24 month followup assessment.
This prospective, multicenter longitudinal five-year study of X-STOP PEEK usage in LSS patients is designed to supplement pre-market safety and effectiveness data with information on longer-term device performance in a population of patients with moderately impaired physical function at preoperative baseline (i.e., an "indicated" population) who elect to undergo X STOP PEEK surgery.
The main purpose of this study is to determine the measurement characteristics of WHODAS-II (World Health Organization Disability Assessment Schedule II), as well as to analyze its correlation with symptomatic lumbar spinal stenosis (Visual Analog Scale, VAS), disability (Spanish version of the Roland Morris Questionnaire, RMQ), fear avoidance beliefs and attitudes (Spanish version of the FAB Questionnaire, FABQ), and quality of life (SF-12). Measurements will be taken at baseline and 6 days later (day 7).
Atherosclerosis and aortic stenosis share inflammatory etiopathogenic characteristics in common. We hypothesized that statins therapy would decrease inflammatory markers concentrations in patients with degenerative aortic stenosis and halt the haemodynamic progression of the disease.
Prospective, single center, descriptive study in 14 infants/children with multivessel pulmonary vein stenosis stratified for patients with or without underlying cardiac disease. Group 1: Patients without additional structural heart disease and multivessel pulmonary vein stenosis. Group 2: Patients with additional structural heart disease and multivessel pulmonary vein stenosis.
Comparison of open and laparoscopic pyloromyotomy
The purpose of the present prospective, randomized, double-blind, double dummy controlled multicenter pilot study is to investigate whether abciximab, compared with aspirin, is able to reduce the rate of recurrent ischemic strokes before and during carotid endarterectomy [CEA] (primary endpoints); and the degree of carotid stenosis, number of microembolic signal (MES) counts, number of ischemic infarcts at diffusion weighted imaging (DWI) and amount of intraluminal thrombus at pathological examination (secondary endpoints) in patients with ischemic stroke due to a >50% carotid stenosis who will undergo CEA.
The purpose of this study is to determine whether aspirin or warfarin is more effective in preventing stroke in patients with intracranial stenosis.