Active clinical trials for "Vascular Diseases"

Biofilm has been identified as the major bacterial phenotype contributing to atherosclerosis. It has become very important to evaluate atherosclerosis and the role of biofilm using advanced technologies. It is also important to understand wound biofilm at a genetic and a molecular level.

The purpose of this compassionate use study, for two patients with thrombotic microangiopathy, is to provide expanded access to patients who have participated in the clinical trial OMS721-TMA-001 and in whom improvement in their disease markers was observed while on treatment or to patients who could otherwise benefit from the treatment. This is a treatment protocol; not a research protocol.Therefore, only patients in study OMS721-TMA-001 deemed eligible by the investigator may participate.

Ticagrelor is a direct-acting, reversible platelet P2Y12 receptor inhibitor recommended by the recent European Society of Cardiology guidelines in patients with acute coronary syndromes (ACS) (class of recommendation I, level of evidence B). Ticagrelor inhibits platelet function stronger, faster and more consistently than clopidogrel, the former standard of antiplatelet therapy. In the landmark PLATO trial (Study of PLATelet inhibition and patient Outcomes), ticagrelor therapy as compared with clopidogrel treatment was associated with the reduced occurrence of major adverse cardiovascular events and all-cause mortality, but also resulted in a small, but statistically significant, increase in the rate of major bleeding. The optimum choice of antiplatelet treatment, aimed to provide each patient with maximum protection against ischemic events, while minimizing the risk of bleeding complications, is the challenge of contemporary ACS therapy. The tool which may help physicians and facilitate clinical decision making is platelet function testing. According to the guidance of both European and American groups of experts, there are three currently recommended platelet function tests, namely the VerifyNow device, the Multiplate analyzer and the Vasodilator Stimulated Phosphoprotein Phosphorylation (VASP) assay. It needs to be emphasized that none of these three methods is preferred over others. So far there are no studies linking pharmacokinetic analysis of ticagrelor and its active metabolite with comparative evaluation of platelet reactivity. The aim of this trial is to assess the relationship between concentrations of ticagrelor and its active metabolite (AR-C124910XX) and results of all three recommended platelet function tests in patients with myocardial infarction. Patients who receive GP IIb/IIIa receptor inhibitor will be excluded from the primary analysis. Statistical analysis: The correlation will be assessed using correlation coefficients and intraclass correlation coefficients. while the agreement between the results of the compared platelet function tests will be measured using the Kappa statistic and Bland-Altman analysis.

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.

Multicenter observational prospective registry, Spanish nationwide-based, of consecutive patients diagnosed with Spontaneous Coronary Artery Dissection (SCAD)