View clinical trials related to Constriction, Pathologic.
Filter by:The investigators plan to collect 30 participants with internal carotid artery stenosis to observed the relationship between the degree of internal carotid artery stenosis and fundus vessels （and blood flow）density before operation, and compared with participants without internal carotid artery stenosis.The fundus blood flow density will be observed after intervention operation in order to see whether the operation is effective to improve the density of fundus vessels and blood flow or not.
The SIBERIA study demonstrated a clear advantage of CGuard stent implantation over the existing classical stent when using a distal anti-embolic device. At the same time, there is no Level 1 evidence for a difference between the proximal and distal anti-embolic device for the CGuard stent.
COPAS pilot is a pilot single center double blinded randomized study to determine the effect of targeted anti-inflammation therapy using colchicine, on valvular calcification activity using imaging, i.e. aortic valvular NaF uptake. The current proposal uses a randomized design to evaluate the effect of colchicine vs. placebo on valvular calcification activity over 6 months measured using NaF PET
TRACE-IMPAIR is a prospective, clinical study of consecutive patients that evaluates the relationship between heart failure (HF) and cognitive impairment in relation to carotid and cerebral flow. The carotid and cerebral flow will be assessed using Doppler ultrasonography, and cognitive function will be estimated during routine neuropsychological tests. It is an observational, three(natural)-group, single-center study. It is also an Academic Registry - the scientific activity of the Faculty of Medicine, Collegium Medicum, Jagiellonian University, and John Paul II Hospital.
Chronic mesenteric ischemia (CMI) is often caused by narrowings in the arteries providing blood to the intestines. Endovascular stent placement is considered the preferred treatment for this condition. Guidelines increasingly support the use of so called covered stents (CS) in stead of bare stents (BMS) for this use but the level of evidence for this is limited. Using CS incur additional costs for healthcare short-term but may prevent recurrence of narrowing and symptoms postoperatively benefitting patients and healthcare. Study Objective: To evaluate the outcomes after stenting of mesenteric arteries using BMS or CS. Study Outcome: Primary stent patency 1 year after placement The trial will also evaluate complications, how often stents need to be reoperated, Quality of Life (QoL) and reasons for subjects death Method: This is a so called prospective, randomized controlled trial comparing CS vs. BMS. This means that one patients have agrred to treatment they will be randomly selected for treatment with either CS or BMS . The stent metal structure is identical in the two implants and the only difference is the graft covering, making this study unique. The study will also collect blood samples for a biobank that will be used to study markers of disease and how these effect treatment outcomes. All patients referred to the Department of Vascular Surgery due to CMI are considered for inclusion if they havechronic symptoms consistent with CMI, significant stenosis or occlusion of the superior mesenteric artery and are > 18 years Subjects not able to provide informed consent or who have non atherosclerotic cause of CMI, signs of acute loss of blood flow to the intestines cannot participate. Previous stent treatment in the superior mesenteric artery, pregnancy, allergies to contrast or stent materials are also reasons for not being included in this trial. Side effects, risks and disadvantages for participants The risk for procedure-related complications is less than 5% and similar in both study groups. Most short-term complications are related to vascular access sites and consist of local bleeding and thrombosis. Other potential complications include impaired renal function due to contrast use, contrast allergy, arterial dissection and death.
Randomized, double-blinded, placebo-controlled study in AS patients with subclinical or clinical heart failure undergoing treatment with TAVR.
The purpose of this exploratory study is to evaluate safety and effectiveness of treatment of juxta-anastomotic (re)stenosis with SUPERA stent by improving hemodynamic situation through obtuse shaping of the anastomosis.
The aim of the study is to evaluate the effect of antifibrotic therapy on regression of myocardial fibrosis after TAVI in patients with baseline high fibrotic burden. Therefore, patients will be treated with Spironolactone in addition to standard of care, Spioronolactone + Dihydralazine in addition to standard of care or according to standard of care alone without any study medication. First, differences between patients in the control arm and patients randomized to anti-fibrotic therapy will be analyzed. The second analysis will determine, whether dihydralazine medication in addition to spironolactone is able to increase a potential antifibrotic effect. Myocardial fibrosis will be assessed by cardiac magnetic resonance imaging (CMR) before TAVI and 1 year after. Quantification of potentially irreversible replacement fibrosis will be carried out by late gadolinium enhancement (LGE), and quantification of the potentially reversible diffuse interstitial fibrosis will be performed by measurement of the extracellular volume fraction (ECV), thereby deriving matrix volume and cell volume.
The DETECT AS Trial is a randomized clinical trial and quality improvement initiative that seeks to investigate the impact of electronic provider notification of severe aortic stenosis (AS) on its management, on the utilization of aortic valve replacement (AVR), and on ethnic and racial disparities in AVR utilization. After the investigators identify patients in whom echocardiography shows severe aortic stenosis, defined by an aortic valve area (AVA) <1.0cm2, the ordering provider of the echocardiogram will then be randomly assigned to either the intervention group or to the control group. Providers randomly assigned to the intervention group will be sent an electronic (email or message via the electronic health record) physician notification for every one of their patients with severe aortic stenosis on TTE. Electronic notification will also highlight relevant ACC/AHA Clinical Practice Guideline recommendations regarding the management of severe AS. No intervention will be performed for patients belonging to physicians assigned to the control group. The primary endpoint will be AVR utilization, defined as the proportion of patients with a clinical indication for severe AS that undergo AVR. Clinical indications will be based upon the 2020 AHA/ACC Clinical Practice Guidelines for Valvular Heart Disease. Secondary end-points will be mortality, heart failure hospitalization, TTE utilization/surveillance, AS billing code diagnosis, and cardiology/Heart Valve Team referral. Pre-defined subgroup analyses will be performed to assess AVR utilization among women, racial/ethnic minority groups, low-gradient AS, cardiologist and non-cardiologist ordering provider, and inpatient and outpatient practice settings.
A randomized controlled trial will be conducted. Patients with asymptomatic intracranial / carotid stenosis will be randomized into two arms (1:1): an intervention arm and a control arm. Patients in the intervention arm will be treated with standard medical treatment combined with Natto Products V, whereas Patient in the control arm will be treated with only standard medical treatment . And the impact of Natto Products V on improving cerebral blood flow and cognitive function in patients with asymptomatic intracranial / carotid stenosis will be assessed by neuropsychological scale and multimode magnetic resonance imaging.