View clinical trials related to Carotid Stenosis.
Filter by:In the entire world most people die from cardiovascular disease. Death is primarily from myocardial infarction (MI) and stroke which are most often caused by rupture of atherosclerotic plaques. Patients with high-grade, i.e. ≥ 70% carotid artery stenosis are at especially high risk. Magnetic Resonance Imaging (MRI) studies show that two features inside plaques that are associated with the risk of plaque rupture and subsequent cardiovascular events are: lipid rich necrotic core (LRNC) and intraplaque hemorrhage (IPH). MRI studies on carotid artery plaques typically relies on proton-density-weighted fast-spin echo, blood-suppressed T1- and T2-weighted gradient-echo sequences. The end-result is nonquantitative measures, where plaque features are identified due to their relative signal intensity. To address these problems of non-specificity, we developed a quantitative MRI (qMRI) technique based on Dixon sequences. The study intention is to enable in-depth analysis of plaque features and their relation to clinical data. For example there is an insufficient understanding of associations between lipid biomarkers and plaque contents. Our hypothesis is that we can identify quantitative changes in both plaque and lipid biomarkers after one year of optimized cardiovascular risk management (including treatment with lipid lowering drugs), and establish if there is any associations between these features. Because there is a well-established link between systemic inflammation and the presence of atherosclerotic plaques we will also study the relationship between LRNC and IPH as measured by qMRI versus circulating markers of inflammation. Method: Patients with known carotid stenosis are invited for a baseline visit and a 1-year follow up visit. The study visits include clinical assessment, blood tests, patient interview and magnetic resonance imaging of the carotid arteries. All participants are offered optimized cardiovascular risk management through the individual assessment by the study physicians.
All neurosurgical patients at the Neurosurgery University Hospital Bern who will be operated for carotid endarterectomy (CEA) are routinely operated in deep anae¬sthesia with suppression of the electrical activity of the electroencephalogram (EEG). To achieve this suppression of the EEG activity (burst suppression, BS) high effector concentrations (Cet) of Propofol doses are needed. However, a protracted infusion of large amounts of Propofol to reach a BS during the operation can lead to accumulation and a protracted wake-up phase with poorer neurological assessability. Somatosensory evoked potentials (SSEP), and trans-cranial Doppler flow velocity in the middle cerebral artery are measured to detect ischemia until the operation. The SSEPs are used to verify the functional integrity of the nervous system in combination of the EEG and both together exclude severe global ischemia during the operation. The central acting α2-agonist Dexmedetomidine could help to reduce the amount of Propofol without influencing electrophysical studies. However, no data are currently known for practical use in carotid endarterectomy with Propofol with co-administration of Dexmedetomidine in conjunction with electrophysiological studies (SSEPs and MEPs).
POLYPATCH® study is RWE multicentre study which examine short and long-term outcomes of using POLYPATCH® when exposed to a larger and more varied population. All data will be retrieved from medical charts for each patient from time of surgery (considered as baseline of study) until a maximum of 3 years after surgery. A minimum of 250 up to a maximum of 300 subjects will be evaluated from 3 to 8 different sites. At least 100 subjects will be evaluated in carotid location and at least 100 in femoral location.
The main objective of this single arm study is to evaluate the safety and feasibility of the AXS Infinity LS (Stryker, Freemont, CA, USA) and AXS Infinity LS Plus (Stryker, Freemont, CA, USA) catheters during the transradial approach through a secondary use of the data collected during neurointerventional procedures. This includes evaluating the conversion rates to a transfemoral approach. A secondary aim of the study is to assess the radial artery occlusion rates post procedure.
This study aims to evaluate ocular changes in patients with carotid artery stenosis by optical coherence tomography angiography before and after carotid artery revascularization procedure.
This study concentrates on providing more ultrasound image details when scanning vascular system including arterial and venous systems. A new sensor which provides 3D images is newly designed. It will be used in this study to find out whether it can change the future of vascular imaging or not.
A prospective comparative randomized single-centre non-inferiority trial. The purpose of this study is to compares of modified method of eversion carotid endarterectomy with standard eversion carotid endarterectomy for 3,6 and 12 months days after operation in patients with extensive atherosclerotic disease of carotid bifurcation
The Neuroguard IEP System is a 3-in-1 carotid stent delivery system consisting of an angioplasty balloon, an integrated embolic protection device and a nitinol self-expanding stent loaded over the balloon and constrained by an outer sheath. The PERFORMANCE I study is a multi-center, prospective, single arm open label study to evaluate the safety and feasibility of the Neuroguard IEP System for the treatment of carotid artery stenosis. The primary endpoint will be the proportion of patients with Major Adverse Events (MAE) reported within 30 days from the index procedure. The primary objective of the PERFORMANCE I study is to evaluate the safety and feasibility of the Neuroguard IEP Carotid Stent System when used in patients with clinically significant carotid artery stenosis requiring revascularization.
Both abdominal aortic aneurysm (AAA) and carotid artery stenosis (CAS) are frequent clinical entities, with major morbidity and mortality. This project obtains robust data on the prevalence of AAA and CAS in the Brussels Capital Region. Using duplex ultrasound, a low invasive examination, we want to obtain information on a vast sample of men and women of the Brussels capital region, starting at the age of 60. With these data we can have a far better view on the Belgian situation of these two main vascular clinical entities. The data can provide insights on if, and how, Belgian public health policy can be improved concerning AAA and CAS.
Patients undergoing carotid endarterectomy in the Department of Vascular Surgery at Oslo University Hospital are consecutively included in this evaluation og pre- and postoperative brain MRI.