View clinical trials related to Vascular Diseases.
Filter by:Identify factors that contribute to perioperative morbidity and mortality in patients undergoing cardiac surgery that involves cardiopulmonary bypass. Identify factors that affect perioperative morbidity and mortality in patients undergoing cardiac surgery.
Cardiac allograft vasculopathy (CAV) is a process of both immune and non-immune mediated thickening of the heart arteries of transplanted hearts. CAV limits the long term survival of heart transplant patients and is one of the common causes of death in the late post transplant period. Current methods of detecting CAV rest with invasive cardiac catheterization which carry repeated risks, as this test needs to be performed periodically through the life of a heart transplant patient. Traditional methods of coronary angiography identify CAV late in its course and is a crude method of evaluating coronary anatomy in heart transplant patients. Intravascular ultrasound is an additive tool that is able to detect early CAV before it becomes angiographically apparent, but still requires invasive cardiac catheterization to perform. However, it also limits assessment to the major epicardial arteries and does not give any information regarding the smaller branch vessels and cardiac microvasculature. Advances in cardiac CT and cardiac MRI hold potential to evaluate for CAV non-invasively. In addition, perfusion techniques may provide additional functional information regarding the status of the microvascular. In this pilot study, we aim to demonstrate the feasibility of cardiac CT and cardiac MRI with and without perfusion protocols, in patients post-heart transplant and to describe and compare CT and MRI findings in patients with established CAV versus those with no CAV, as diagnosed by standard invasive methods.
To collect data on the routine patterns of use, safety and effectiveness, including the clinical and technical performance of the CorPath 200 System, in the delivery and manipulation of coronary guidewires and stent/balloon catheters during PCI procedures.
The objectives of this clinical trial is to validate a S/W application to compare the calculations of Hemodynamic parameters like Continuous blood pressure (BP) and Continuous cardiac output (CO). This Hemodynamic parameters are computed from Pulse Oximeter (PhotoPlethysmograph or PPG) signal with results obtained by NIBP intermittent measurements and Echocardiography. The first phase of the study will be done on 10 patients of the Cardiology dept.- Cardiac ICU, that have routine measurements of BP and CO using Echocardiography. The HeartBeat system combines an FDA/CE approved watch-like Pulse Oximeter for acquiring the data and a Smartphone S/W application that serves as the Hemodynamic calculator. The S/W application performs POST-PROCESSING of the PhotoPlethismoGraphic (PPG) signal (Normally the PPG signal in Pulse Oximeters is used only to compute heart rate and SpO2). The raw data is transferred from the watch oximeter to the smartphone using a standard Bluetooth protocol. The Post-processing uses wavelet signal processing to estimate and display certain Hemodynamic parameters like (Blood Pressure) BP and CO in a continuous and graphical way on a standard Android Smartphone. In addition to the standard heart rate and SpO2, the application displays the measured PPG signal and estimated continues BP and CO. HeartBeat is the only device that can non-invasively estimate Continuous BP and its Cardiac Output component and the resistance component in a mobile wearable device. Differentiating between these 2 components can play a major role in helping the doctor to understand the effect of cardiovascular medications and Lifestyle interventions.
This study aims to investigate the predictive value of novel biomarkers and contrast-enhanced ultrasonography for early detection of abdominal end-organ (kidney and intestinum) hypoperfusion and ischemia in patients undergoing endovascular aortic repair (EVAR) for aortic aneurysm or dissection. In this context, patients will be monitored for renal biomarkers (TIMP-2, IGFBP7) and intestinal biomarkers (plasmatic intestinal fatty acid binding protein (i-FABP)) and local tissue perfusion will be assessed using contrast-enhanced ultrasonography (CEUS). The ultimate goal of this study is an early identification of patients developing one or both of these complications, which may facilitate a timely intervention to improve outcome.
The registry aims to evaluate the safety, performance and efficacy of the Everolimus-eluting bioresorbable vascular scaffold (BVS) system following rotational atherectomy in patients with complex de novo native coronary artery lesions in all-day clinical practice.
The investigators will conduct a proof-of-concept study to provide preliminary evidence of efficacy of physical exercise dose on ambulatory function in adults undergoing sub-acute stroke rehabilitation.
The purpose of this study is to determine whether autologous bone marrow-derived stem cells are effective in the treatment of lower extremity ischemia.
The proposed PIVOTAL study will examine a panel of platelet/coagulation activity markers during the perioperative period. The goal is to develop a clinically useful assessment of platelet/coagulation activity for risk stratification that may ultimately serve as a target for therapeutic intervention. This study will enroll 200 patients with peripheral artery disease undergoing vascular surgery. PIVOTAL is funded by American Heart Association and is scheduled to begin enrollment in July 2013 for approximately two years.
The purpose of this pilot study is to find out what eating meals in a short time period early in the day (time-restricted feeding) versus eating meals spread out during the day (grazing) does to the body's ability to control blood sugar and to the health of its blood vessels. The investigators hypothesize that time-restricted feeding will be more effective at improving glucose tolerance and vascular condition (inflammation and micro- and macro-vascular function) than grazing.