Active clinical trials for "Vascular Diseases"

The main purposes of this study are: to describe the prevalence and degree of reduced left ventricular function and hypertrophy in patients with peripheral arterial disease in comparison to controls from the general population, to evaluate factors of importance to left ventricular dysfunction and hypertrophy in patients with peripheral arterial disease, and to assess the impact of cardiac function and left ventricular hypertrophy on long-term prognosis in patients with peripheral artery disease.

Atrial fibrillation (AF) is the most common clinical arrhythmia. AF is associated with increased risk for stroke due to blood clots formed in the fibrillating atria. Some patient characteristics increase the likelyhood of AF and at the same time the risk of stroke when AF has developed. To reduce the risk of stroke, anticoagulation therapy is recommended in patients with AF and risk factors (such as high blood pressure, diabetes, vessel disease). However, occasional (paroxysmal) AF may occur without symptoms and remain undetected, leaving patients at risk. Aim of the prospective randomized study is to compare two management strategies for patients at increased risk for AF but without a known history of AF. Patients are seen regularly (monthly, then quarterly) for follow-up (incl. ECG recording and blood sample). One group of patients additionally receives a subcutaneous implantation of a loop recorder for continuous rhythm monitoring, while the control group remains on standard follow-up. Observation period is one year (optional extension for 3 years). The time to first diagnosis of AF is compared between groups, blood samples are analyzed for potential biomarkers of AF.

The purpose of the Universal Registry is to assess the proportion and reasons for which subjects with angiographically significant ULMCA disease requiring revascularization during the time course of this study are not randomized; to compare the baseline characteristics of subjects; and to assess the variability in randomization eligibility and treatment patterns.

The purpose of this study is to assess the benefits of endovascular repair with Endurant Stent Graft System by documenting overall mortality, complications, the rate of conversion to open surgical repair, and the development and rupture of the aneurysm on a long term, i.e. at 5 years, in a cohort of patients representative of the population treated under real-life conditions of use in France.

Relation between Renin-Angiotensin Gene Polymorphisms, Plasma Adiponectin and Arterial Stiffness in Renal Transplant Recipients

To determine the mechanisms by which atherosclerotic peripheral artery disease (PAD) causes functional impairment and to define the degree to which peripheral artery disease associated pathophysiologic findings change over time.

To evaluate potentially modifiable lifestyle predictors of venous thromboembolism and their joint associations with biochemical and genetic determinants.

The purpose of this study is to evaluate whether the addition of warfarin (a blood-thinning medication) to an antiplatelet therapy like aspirin is better than antiplatelet therapy alone (i.e. usual treatment) for the prevention of leg surgery, heart attacks, stroke and death in people with peripheral vascular disease.

Macular neovascular diseases including age-related macular degeneration (AMD), polypoidal choroidal vasculopathy (PCV), pathological myopia (PM) and etc. can cause severe vision loss. It has become the focus of World Health Organization's blindness- prevention cause. A new anti-VEGF drug conbercept has been approved and showed good efficacy and safety in clinical trials. But the exact therapeutic regimen and the efficacy in the real world still needs to be further studied, the reasons are as follows: The efficacy and safety data of conbercept are collected from rigorous random controlled trials (RCT) , it can not fully reflect the clinical application of conbercept in the real world . Therefore, the knowledge of the therapeutic regimen, safety and efficacy of conbercept is still limited. Conbercept has been approved for wet-AMD only, but in clinical practice, some doctors applied other "off-label use" of conbercept. These "off-label use" has become a common phenomenon all over the world for the instruction book of drugs usually lag behind scientific researches. There is no specific law or regulatory document of drug off-label use in China until now. Anti-VEGF drugs are expensive and often require multiple treatments, and some patients have poor or even no response to the drugs. This resulted enormous waste of medical resources. So, how to accurately find out those patients who have good response, how to develop individualized therapeutic regimen, and the response of patients in the real world need to be urgently investigated in the aspect of pharmacogenomics, and pharmacometabolomics. Therefore, the investigators plan to carry out real-world researches of conbercept on treating macular neovascular diseases has significance and urgency. The investigators intended to conduct a nationwide, non-intrusive, prospective, observational, and multicenter registration study to investigate the efficacy of conbercept in the real-world. And this study will explore the pharmacogenomics and pharmacometabolomics of conbercept, relationships of phenotype and the effectiveness of the drug, optimize the therapeutic regimen, then reduce the financial burden of patients and save the limited medical resources to achieve the purpose of accurate treatment. For three unanswered questions raised in the background, the researchers carried out the following purposes: Investigate the safety and efficacy of conbercept in treating neovascular macular disease in the real world. Find out whether the "off-label use" of conbercept on PCV and PM have good efficacy. Explore the pharmacogenomics and pharmacometabolomics of conbercept through large-sample registration study.

SCAD (Spontaneous coronary artery dissection - tear in the arterial wall that is not related to trauma) is an under-diagnosed and poorly understood condition that mostly affects young women without common cardiovascular risk factors, and can result in heart attack and death. This observational study is designed to capture the disease's natural history and predisposing arteriopathies (medical conditions resulting in changes in the arteries), treatment strategies, long-term cardiovascular outcomes. It will also improve the diagnosis of SCAD on coronary angiography by participating clinicians, and provide guidance on investigating predisposing conditions.