View clinical trials related to Constriction, Pathologic.
Filter by:This study will be evaluate the autonomic, endothelial and hemodynamic functions, inspiratory muscle strength, peripheral tissue oxygenation, peripheral and respiratory muscle architecture, and inflammatory profile of severe AS patients submitted undergoing to valve replacement (sAVR) or transcatheter aortic valve implantation (TAVI), and their influence on the pathophysiological mechanisms involved in cardiovascular rehabilitation.
Biliary strictures present a diagnostic and therapeutic challenge to clinicians due to unsatisfied accuracy of sampling modality. The major problem is very difficult to discern malignant from non-malignant strictures, such as patients with primary sclerosing cholangitis (PSC). With the poor prognosis and high mortality rate of advanced stage of hepatopancreaticobiliary malignancies, early and accurate diagnosis impacts patients' outcome and possible surgical candidacy. Therefore, a pre-operative determination of malignancy to help plan appropriate treatment is highly desirable. Before 2000s, several diagnostic modalities, including laboratory tests, ultrasonography (US), computed tomography (CT) scan, cholangiography by percutaneous transhepatic cholangiography endoscopic (PTC) and endoscopic retrograde cholangiopancreatography (ERCP), and brushing cytology disclosed 13% to 24% false positive rate for suspicious malignant hilar strictures. Compared to recent studies, ERCP brushings still suffer from low sensitivity (41.6% ± 3.2% (99% CI)) and negative predictive value (58.0% ± 3.2% (99% CI)). In order to increase diagnostic accuracy, at least two sampling methods, including brushing cytology, biopsy, and fine-needle aspiration is therefore recommended. One article showed multimodal tissue-sampling (Brushing + Biopsy + Fine-needle aspiration) increased the sensitivity for diagnosis of malignant biliary stricture to 62%. However, no any literature demonstrate the best sequence of combined sampling modalities to yield the highest diagnostic accuracy. Besides, the role of stricture dilation before or after different tissue sampling modality is still uncertain. In this study, the investigators want to compare stricture dilation before or after multimodal tissue-sampling, including brush cytology, intraductal suction and forceps biopsy for the diagnosis of malignant biliary stricture and also assess which kind of the sequence of combined tissue-sampling modalities could offer the highest diagnostic accuracy.
TASS-2 (Tyrolean Aortic Stenosis Study-2) aims to characterize the clinical value of minimally elevated troponin T plasma levels both in patients with asymptomatic and symtomatic aortic stenosis.
Nocturnal calf cramps is a common complaint in patients with lumbar spinal stenosis. The purpose of this study is to evaluate the effect of botulinum toxin A injection into the gastrocnemius muscle in lumbar spinal stenosis patients receiving conservative therapy. We will compare pain score, insomnia severity, functional ability, patient satisfaction, and neurophysiological variables change using electrical stimulator between control (conservative management for spinal stenosis) and botox group (conservative management for spinal stenosis plus botox injection into the gastrocnemius muscle).
Fluorescence in situ hybridization (FISH) has improved the diagnostic performance of cytology for evaluation of malignant biliary strictures in the US and Europe. The utility of FISH for diagnosis of biliary strictures in Asia is currently unknown. The investigators conducted a prospective study in 2 university hospitals to determine diagnostic performance of FISH for the diagnosis of malignant biliary strictures in Thai patients.
Whether to intervene in asymptomatic patients with severe aortic stenosis and normal left ventricular ejection fraction remains controversial. The investigators therefore try to compare clinical outcomes of elective aortic valve replacement to conventional treatment and watchful waiting strategy in a prospective randomized trial.
This study will be a multicentre randomized controlled trial to assess the efficacy between balloon dilatation and self-expanding metallic stent placement for endoscopic treatment of stenosis in Crohn´s Disease.
Aortic stenosis results in increased filling pressures of the heart. Size and function of the left atrium may be a marker for more advanced heart disease (heart failure) in patients with severe aortic stenosis, not presenting any apparent symptoms. The goal of this study is to establish the importance and possible implications of left atrial dilation in asymptomatic patients with aortic valve stenosis.
The purpose of this study is to evaluate the clinical outcomes of transcatheter aortic valve replacement (TAVR) in patients with bicuspid aortic valve stenosis.
The objective of the study is to evaluate the efficacy of Erythropoietin (EPO) (+ iron) in reducing the rate of red blood cell transfusion requirements in patients with aortic stenosis undergoing transcatheter aortic valve replacement.