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Active clinical trials for "Constriction, Pathologic"

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Outcomes of Transcatheter Aortic Valve Implantation in Management of Severe Symptomatic Aortic Stenosis...

Aortic Valve Stenosis

TAVI is still a relatively new technique that is emerging with advance in the percutaneous and implantable valve technology. Despite its safe use in inoperable and high risk patients with severe symptomatic aortic valve stenosis, minimizing complications, predictors of outcomes and approach preference is still an area of study. Here we decided to study the outcomes of patients undergoing TAVI, different approaches used and their subsequent results and complications.

Unknown status2 enrollment criteria

AS OCT Evaluation for Perforated Punctual Plugs

Punctal Stenosis

Evaluation of the perforated punctal plugs after implantation in cases of punctal stenosis regarding position and patency in the early postoperative period (during the first operative weak)

Unknown status2 enrollment criteria

Validation of a Novel, Non-Dimensional Approach for Estimation of Pressure Gradients in Aortic Stenosis...

Aortic Valve Stenosis

A novel, image-based model for estimation of the pressure gradient across stenosed aortic valves is compared against invasively measured pressure gradients from clinical routine.

Unknown status2 enrollment criteria

Aortic Stenosis in Subjects With Heterozygous Familial Hypercholesterolemia on Prolonged Treatment...

Aortic StenosisArteriosclerosis2 more

Aortic stenosis (AE) is a disease that has been increasing steadily in recent years in most countries, including Spain.Risk factors for the development of AE include age, hypercholesterolemia, diabetes mellitus and arterial hypertension, the classic risk factors for the development of atherosclerosis. However, lipid-lowering therapy with statins and ezetimibe has not been shown to reduce the risk of long-term progression of AE by unknown mechanisms. All this suggests that subjects with HFhe have a high risk of developing AD, which has not been shown by the high coronary mortality in this population that precedes aortic calcification

Unknown status12 enrollment criteria

Application of speCtraL Computed tomogrAphy to impRove specIficity of Cardiac compuTed tomographY...

Coronary StenosisMyocardial Ischemia1 more

Cardiovascular disease remains the leading cause of morbidity and mortality worldwide. Coronary computed tomography angiography (CCTA) and, if indicated, invasively measured fractional flow reserve (FFR) is currently used for ruling out significant coronary artery disease. FFRCT is a novel non-invasive technique in which FFR is derived from CT images, however this method is currently, just like CCTA, lacking specificity. Spectral Detector CT (SDCT) is a novel technique whereby a spectrum of monoenergetic images at different kiloelectron Volt (keV) values (40 to 200 keV) can be reconstructed. By using these monoenergetic images, a decrease in blooming and beam-hardening artifacts could be achieved. In addition, SDCT offers the opportunity to assess myocardial iodine distribution and quantification. When combining these factors, we hypothesize more accurate information will be available about the coronary anatomy, degree of stenosis and FFRCT and thereby contribute to a more accurate way for the detection of hemodynamic significant stenosis. Therefore, the aim of this study is to assess the accuracy of SDCT as a non-invasive way for the detection of hemodynamically significant coronary artery stenosis. Objective: The overall objective of this project is to assess the accuracy of SDCT for the detection of flow limiting stenosis in the coronary arteries using invasive FFR as the standard of reference. Whereby different sub-aims (e.g. improvement of FFRCT) are made to answer the overall objective. The secondary objective is to determine the decrease of calcium blooming of calcifications and beam-hardening artifacts and the improvement of myocardial blood volume quantification on SDCT in comparison with conventional CT.

Unknown status12 enrollment criteria

Severe Aortic Stenosis in Patients Referred for Valve Surgery

Aortic StenosisValvular Heart Disease1 more

Our main hypothesis on the present study is that new parameters such as risk-taking behavior, patients motivation, health related quality of life, new biomarkers and more precise echocardiography measures in addition to traditional parameters will improve pre-operative risk assessment in patients with AS and better guide patients and doctors in decision whether to operate or not.

Unknown status2 enrollment criteria

Volumetric Laser Endomicroscopy's (VLE) Diagnostic Accuracy Validation Study: Impact on Clinical...

Biliary StricturePancreas Cancer16 more

The purpose of this study is to assess the interobserver agreement (IOV) for pancreatico-biliary Volumetric Laser Endomicroscopy (VLE) de-identified clips using the new VLE criteria. This is an Interobserver study to validate VLE criteria for indeterminate biliary and pancreatic duct strictures and evaluate impact on clinical management.

Unknown status2 enrollment criteria

Influence of EPICardial Adipose Tissue in HEART Diseases: EPICHEART Study

Coronary Artery DiseaseCoronary Arteriosclerosis3 more

This translational study was designed to explore the association of the quantity and quality of epicardial adipose tissue (EAT) with coronary artery disease (CAD), left atrial remodeling and postoperative atrial fibrillation in a high cardiovascular disease-risk population. The investigators expect to identify new biochemical factors and biomarkers in the crosstalk between the epicardial adipocytes, coronary plaques and atrial cardiomyocytes that are involved in the pathogenesis of atherosclerosis and atrial fibrillation, respectively.

Unknown status9 enrollment criteria

Observational Study for the Evaluation of Tracheal Stenosis in COVID-19 Patients

Tracheal Stenosis

Define the actual incidence of tracheal stenosis in patients who underwent either prolonged intubation or tracheostomy and to compare incidence, clinical course and outcome between COVID-19 and non-COVID-19 patients.

Unknown status6 enrollment criteria

Periodontitis and Atherosclerotic-related Arterial Stenosis

Atherosclerosis of Artery

This study aimed to evaluate the association between periodontitis and atherosclerosis of the cerebral vasculature in the Chinese population.

Unknown status6 enrollment criteria
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