Active clinical trials for "Constriction, Pathologic"

The purpose of this study is to document stent functionality and practice patterns in Canada pertaining to indications for use and stent type selection for self-expanding biliary metal stents (SEMS) when used per standard of practice.

The primary objective of this study is to determine the reasons for balloon aortic valvuloplasty (BAV) in the current clinical setting and to determine the outcomes of BAV in patients with aortic stenosis. The ultimate aim is to establish the safety, effectiveness, and appropriate role of BAV therapy as definitive therapy (palliation) or as a "bridge" to surgical aortic valve replacement (SAVR) or transcatheter aortic valve replacement (TAVR).

The purpose of this registry is to observe longterm performance and safety of the JenaValve TAVI system, in routine medical and everyday conditions.

This study will evaluate the importance of arterial stiffness and wave reflections as determinants of persistent left ventricular (LV) hypertrophy and fibrosis (assessed using cardiac magnetic resonance imaging [MRI]) after correction of severe stenosis of the aortic valve. The hypothesis will test whether stiff arteries and increased wave reflections impede pumping of blood by the LV after aortic valve replacement (AVR)and precent adequate regression (improvement) of hypertrophy and fibrosis of the myocardium despite correction of aortic valve stenosis.

Self-expanding metallic stent placement is a safe and effective endoscopic procedure increasingly used to relieve colonic obstruction. Fully covered metal stents (FCSEMS) and plastic stents have been recently developed to reduce both hyperplastic (non tumoral) and tumoral tissue ingrowth. These fully covered metal or plastic stents have several advantages over non-covered stents, including the possibility of retrieval and limited local tissue reaction, while providing alleviation of obstruction at possibly lower costs. Only few reports of fully covered metal stent placement in patients with benign colorectal strictures are available in the literature. The aim of this study was to assess the effectiveness of FCSEMS in the management of the colonic benign strictures.

This study evaluated the long-term outcome of patients with chronic total occlusion treated with percutaneous coronary intervention, medical treatment or coronary artery bypass grafting.

To detect coronary artery disease by both coronary and carotid artery imaging and myocardial perfusion imaging using a new low mechanical index real time system.

The purpose of the study is to test a new amplified stethoscope(AudioDoc) that can detect the presence of bruit by using an acoustic signal to represent the bruit. This pilot study will address two questions: is there a detectable difference in recorded sound signal of carotid and femoral bruit when compared to sound signals captured when there is no bruit present; is the use of a visual recorded signal more accurate in identifying carotid and femoral bruit when compared to traditional auscultation with a regular stethoscope and ultrasound.

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 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).