Active clinical trials for "Aortic Aneurysm"

Abdominal aortic aneurysm (AAA) is a common vascular disease and associated with risk of rupture, but also with a high cardiovascular (CV) event rate. A key difficulty in AAA is predicting these life-threatening complications. Recent studies suggest that the endothelial function of the abdominal aorta might have a correlation with the disease development. A novel, easy to perform, non-invasive test can assess central artery endothelial function (i.e. the carotid artery reactivity (CAR)). The CAR test is based on the cold pressure test (CPT), which induces sympathetic stimulation by placing one hand in cold water. Using duplex ultrasound, central artery blood flow and diameter responses can be examined. Previous work has demonstrated that the CPT is associated with an increase in abdominal aortic diameter, whilst others found that the carotid and coronary artery diameter also shows dilation. Interestingly, a previous study found a strong correlation between carotid and coronary artery diameter responses to the CPT, whilst these artery responses show independent prognostic value for future cardiovascular events in patients with peripheral arterial disease. Possibly, similarity may be present in central artery reactivity to the CPT. To date, no study examined whether carotid and aorta responses are in agreement during the CPT. Given the potential importance of central artery vasoreactivity for AAA, the CAR-test may have potential in this group, especially given the relative simplicity of measuring the carotid artery. The aim of this explorative study is to investigate the correlation between the magnitude of the abdominal aorta and the carotid artery diameter and blood flow responses during the sympathetic stimulation (using the cold pressor test) between healthy young, healthy older and individuals with AAA.

The overall aim is to determine the frequency by which women and men with intact abdominal aortic aneurysms (AAA) are treated with elective surgery at three vascular outpatient clinics in Europe, and to investigate whether the reasons to refrain from elective surgery differ between the sexes.

Aortic valve bicuspid disease is the most common congenital heart disease. It affects 0.5-2% of the population and is associated with an increased risk of developing aortic or ascending aortic valve complications. There is no agreement regarding the opportunity for a "prophylactic" simultaneous aortic valve replacement in the case of mild or moderate aortic valve disease in the bicuspid valve, in patients with an indication for replacement of the ascending aorta due to an aneurysm involving its supra-coronary tract. The aim of this study is to evaluate the long-term evolution of mild and moderate aortic valve disease in untreated bicuspid valve during supracoronary ascending aortic replacement surgery at our institution.

The purpose of this study is to evaluate by non-invasive methods the change in central hemodynamics and arterial stiffness produced by grafts and endografts after abdominal aortic aneurysm repair. Our main goal is to measure the changes in: Augmentation index, central blood pressure, pulse wave analysis, pulse wave velocity.

The purpose of the study is to investigate imaging findings, which can help us to predict factors contributing to abdominal aortic aneurysm growth and rupture.

The Zenith TX2 Low Profile TAA Endovascular Graft extended study is to collect confirmatory safety and effectiveness data. The Zenith TX2 Low Profile TAA Endovascular Graft is indicated for the treatment of patients with a descending thoracic aortic aneurysm or penetrating ulcer and has an anatomy suitable for repair.

Re-hospitalization or re-intervention is sometimes necessary to treat type I and type III endoleaks after EVAR for its persistent increasing of pressure in aneurysm lumen. Color-coded quantitative digital subtraction angiography (CQDSA) provides an easy and quick way to post-process the traditional digital subtraction angiography (DSA) which converts the peak time of the maximal contrast medium intensity into a single polychromatic image. With the help of CQDSA, a quantitative evaluation of the endoleak hemodynamics and a risk analysis of the type I or type III endoleak could be performed during the EVAR procedure. This approach may offer an objective assessment of the needs for immediate re-intervention, conservative therapy or treatment endpoint in the future.

This study is a continuation of the pivotal trial studying the safety and efficacy of the Relay thoracic stent-graft system to treat thoracic aortic aneurysms. Efficacy is being evaluated by the device-related adverse event rate of endovascular repair (via the Relay thoracic stent-graft) through 1 year. Safety is being evaluated by comparing major adverse events through 1 year in subjects treated with the Relay thoracic stent-graft to those who underwent surgical repair.

The National Registry of Genetically Triggered Thoracic Aortic Aneurysms and Cardiovascular Conditions (GenTAC) was initiated in 2006 by the National Heart, Lung, and Blood Institute (NHLBI) and the National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS). GenTAC established a registry of 3706 patients with genetic conditions that may be related to thoracic aortic aneurysms and collected medical data and biologic samples. The study ended in September 2016. Data and samples are available from NHLBI and requests should be made to BioLINCC. See the NHLBI website for more information: https://www.nhlbi.nih.gov/research/resources/gentac/.

Elective open aortic aneurysm repair has an overall reported 30 day mortality of 2-6 percent, but in patients more than 65-70 years the mortality is reported to be more than 10 percent. The phenomenon of acute lung injury (ALI)/adult respiratory distress syndrome (ARDS) after infra renal abdominal aneurysm repair caused by ischemia-reperfusion is well established. The degree of disability varies from a light degree of acute respiratory failure to mortality for patients with the same profile of risk. Primary aim is to develop a model that monitors inflammatory marker molecules collected from the bronchial epithelial lining fluid by microdialysis. The method with examination of the bronchial epithelial lining fluid by microdialysis and analysis of multiple inflammation markers as previously done by the investigators group.