Active clinical trials for "Constriction, Pathologic"

This study is aim to disclose the effect of contrast media, which used in epidural steroid injections, on the parameters of thyroid function tests (TFTs). The patients who underwent an epidural steroid injection were included. The investigators hypothesized that contrast media owing to contain iodine may impair the values of TFTs.

The device involved in this trail is a diagnostic software with a Prospective, Multicenter, Self Controlled design. FFRCT diagnostic performance was calculated by CardioSimFFRct Analysis software, and the diagnostic accuracy, sensitivity, specificity, positive predictive value and negative predictive performance of FFRCT for myocardial ischemia were calculated per-patient level and per-vessel level with invasive FFR value as gold standard.

Aortic stenosis is a major cause of morbidity around the world. Progressive aortic stenosis leads to cardiac hypertrophy as a compensatory response. A maladaptive response may lead to heart failure at varying degrees of severity of aortic stenosis in individual patients. The predicting factors for the occurrence of a maladaptive response are not well defined. Therefore current medical therapy for aortic stenosis is considered insufficient and may actually cause harm. The only effective therapy for severe, symptomatic aortic stenosis is aortic valve replacement. It has been found in an experimental study that Podocan determines the degree of cardiac hypertrophy in response to pressure overload via the Wnt-pathway. The possible prognostic role of secreted circulating Wnt modulators in aortic stenosis has also recently gained attention. This project will attempt to establish the prognostic role of circulatory Podocan and Wnt modulators for maladaptive left ventricular response to aortic stenosis. This may help identify patients at particular risk to develop left ventricular dysfunction with aortic stenosis and improve understanding of the mechanisms of left ventricular remodeling in aortic stenosis. Hence, this may also later act as an important background in finding more effective therapies to prevent or delay maladaptive left ventricular response in aortic stenosis.

The management of symptomatic patients with moderate Aortic Stenosis (AS) remains challenging and tests that would give more definitive answers are needed. The value of increase in Aortic Valve mean Gradient (AVMG), lack of change in Aortic Valve area (AVA) and calculation of valve compliance/resistance during stress echo (SE) in the symptomatic moderate AS population prognostication has to the investigators knowledge not been examined before. Similarly the additive value of myocardial blood flow reserve (MBFR), Computed Tomography (CT) calcium score, speckle tracking echocardiography, carotid ultrasonography, and N-Terminal pro B- type natriuretic peptide B (NT-proBNP) in the prognostication of this population group especially in combination with SE remains unclear.

Lumbar stenosis (LSS) is the most frequent degenerative lumbar disease and is the most frequent indication for spinal surgery. When non-invasive treatments fail, decompression surgery is the gold standard therapy for the majority of patients and generally improves symptoms. However, few studies have investigated the improvement in posture (radiological parameters) after surgery. In lumbar stenosis, patients may present a forward leaning posture (to relieve pain), which is responsible for sagittal imbalance. The aim of this prospective study was to evaluate the repercussions of decompression surgery on sagittal balance and to compare these with aux clinical results. investigators included patients operated on for isolated lumbar canal stenosis.

Gastric conduit ischemia or anastomotic breakdown after esophagectomy with cervical esophagogastrostomy often cause severe complications, such as leakage, necrotic organs, and strictures. Thus, the purpose of this study is the safety and efficacy of endoscopic evaluation about reconstructive organs after esophagectomy. The investigators evaluate endoscopic predictions using classifications in acute phase after esophagogastrostomy.

The investigators decided to make a study with a cohort of patients as homogenous as possible with a cross clamp time around 70 min. Adult patients with a severe aortic stenoses without any other significant heart disease was included in our prospective randomised study. This group of patients was chosen for two reasons. First, these patients have left ventricular hypertrophy making the myocardium vulnerable to ischemia, secondly the investigators wanted to avoid the possible confounding effect of ischemia found in patients with variable degrees of coronary artery disease. Therefore, patients with additional significant coronary artery disease (≥ 50% stenoses) were excluded from the study.

The SAMMPRIS suggested that aggressive treatment was superior to intravascular stenting in patients with severe symptomatic intracranial atherosclerotic stenosis (ICAS) due to high complication rate in patients in stenting group. However the intravascular therapy is going on because of low complication rate in considerable Chinese studies coming from several high volume stroke centers. Given to 12.2% patients failing to aggressive medical therap in the SAMMPRIS study, it is imperative to performing an multiple prospective registry study of stenting for patients with ICAS in China.

The German-Austrian ABSORB Register shall provide an analysis of acute and long-term safety as well as therapy outcomes of the ABSORB (trade mark) bioresorbable vascular scaffold system in patients suffering from coronary artery disease.

This study will determine whether Ataciguat (HMR1766) is well-tolerated in patients with mild to moderate calcific aortic valve stenosis. The primary focus of these studies will be on changes in blood pressure and orthostatic tolerance (i.e., ability to stand up without passing out), and determining whether treatment with Ataciguat results in significant reductions in blood pressure in this patient population.