View clinical trials related to Vascular Diseases.
Filter by:The purpose of the study is to assess the effect of blood flow to the heart when subjects are treated with ticagrelor (Brilinta) or clopidogrel (antiplatelet drugs that stop the blood from clumping together) in patients with Peripheral Artery Disease (PAD).
Hypothesis 1: Treatment of heart transplant recipients with sildenafil, a PDE-5 inhibitor, will improve small artery elasticity (SAE) when compared to placebo. Hypothesis 2: PDE-5 inhibition will improve endothelial function, resulting in increased production of nitric oxide, reduced activation of circulating endothelial cells, and increased endothelial progenitor cells.
This is a non-randomized, non-interventional pilot observational study designed to follow high-risk patients through their surgical and hospital stay. The investigators will collect 2 4ml vial's of blood (total of 8ml) prior to surgery to assess CV biomarkers - inflammatory, metabolic, hypercoagulable and platelet.
In this investigation, the investigators will attempt to demonstrate that patients who have received nerve blocks (regional anesthesia) prior to open surgical vascular bypass of the lower extremities (infrainguinal bypass grafting) will have improved surgical outcomes namely a reduction in the rates of death, wound infection, graft thrombosis, graft revision, and amputation. As well, the investigators anticipate that patients who have undergone regional anesthesia for infrainguinal bypass grafting will have improved secondary outcomes with respect to a decreased length of stay, narcotic consumption, nausea and vomiting, post-operative cognitive dysfunction, major cardiac events, post-operative pain, and hyperglycemic episodes.
Unblinded, randomized, balanced trial comparing 12 month target lesion patency rates of the IDEV SUPERA VERITAS peripheral stent system to PTA in the treatment of obstructive atherosclerotic popliteal artery disease.
Study the effectiveness of the treatment detachment of retinal pigment epithelium secondary to polypoidal choroidal vasculopathy. Efficacy will be assessed by regression of polyp area after twelve months, compared to baseline. Treatment under study is a triple therapy with: 1) reduced-fluence photodynamic therapy (PDT), 2) intravitreal (IVT) triamcinolone and, 3) IVT ranibizumab, for the treatment of detachment of the retinal pigment epithelium (PED) secondary to Polypoidal Choroidal Vasculopathy (PCV).
Post transplant vasculopathy is a major negative outcome in heart transplantation. Current methods of detection are highly invasive and pose a risk to transplant recipients. Noninvasive markers of endothelial function can be used to detect transplant vasculopathy. Endothelial biomarkers such as: endothelial nitric oxide synthase, vascular cellular adhesion molecules, intracellular adhesion molecules, endothelin-1, thromboplastin, circulating endothelial cells, uric acid, and C-reactive play a role in the pathophysiologic mechanism of vasculopathy. Therefore, the investigators would like to assess the association between various endothelial biomarkers and the presence or absence of transplant vasculopathy.
Although microparticles have been well-documented as mediators of inflammation and coagulation in various cardio-vascular disease events, it is currently not known how Percutaneous Transluminal Angioplasty (PTA) for peripheral arterial disease influences microparticle numbers, phenotype and distribution pre- and post interventionally and how they are related to or affect the incidence of early re-stenosis - or if indeed they may be used to predict patients at risk of early re-stenosis.
1. Early initiation of sirolimus will prevent or delay the development of intimal thickening and subsequent graft failure. 2. Treatment guided by the development of cardiac allograft vasculopathy (CAV) on intravascular ultrasound (IVUS) will be more effective in delaying progression of CAV compared to treatment guided by angiography. 3. Prevention of the development and progression of intimal thickness on IVUS will prevent the development of heart failure, graft dysfunction, and cardiovascular death related to CAV. 4. Small artery elasticity predicts progression of cardiac allograft vasculopathy and is modified by sirolimus 5. Patients who have no progression of CAV will have favorable improvement in biomarkers and endothelial cells compared to patients who have progression of CAV
Abnormal peripheral endothelial function and alterations in circulating biomarkers that are associated with endothelial activation and inflammation correlate with angiographic evidence of cardiac allograft vasculopathy, defined as greater than 25% stenosis in a major coronary artery.