View clinical trials related to Aneurysm.
Filter by:To compare CO values obtained by the lithium indicator dilution method and pulse power analysis before, during and after anaesthesia and surgery for the elective repair of abdominal aortic aneurysms. This will enable us to determine how often and when calibration of the pulse power analysis derived CO is required.
The primary objectives of this study are to determine whether the Ovation Abdominal Stent Graft System is a safe and effective method of treating abdominal aortic aneurysms (AAA's) in those patients considered to be suitable candidates for open surgical repair.
A Clinical Study to Evaluate the Safety and Performance of the TriVascular Ovation Abdominal Stent Graft System
A prospective, non-randomized multi-center clinical evaluation of the performance of the TriVascular Thoracic Stent Graft System when used in the treatment of subjects with thoracic aortic aneurysms (TAA).
Intracranial aneurysm (localized dilatation in weakened blood vessel wall) rupture is a catastrophic disease, with half of the victims died and many of the survivors disabled. There is currently no data in the literature for the Chinese population concerning the prevalence, characteristics (location and size) and risk of harboring an unruptured intracranial aneurysm. In this study, the investigators aim to study the population prevalence and characteristics (location and size) of intracranial aneurysm in Hong Kong Chinese, and its cost-effectiveness. The screening is carried out using magnetic resonance angiography (MRA), with a 3-T magnetic resonance system, which is a well-established non-invasive method for intracranial aneurysm detection.
To determine the safety and effectiveness of PEVAR.
Aneurysm formation is associated with a chronic inflammatory response, depletion of smooth muscle cell population and excessive matrix metalloproteinases (MMPs) production. 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase inhibitors (statins) are lipid lowering agents with pleiotropic effects including anti-inflammatory activity. Elective open AAA repair patients will be randomised to receive either statin (Atorvastatin 80 mg) or placebo (dummy tablet) for 4 weeks pre-operatively. Tissue samples will be obtained from patient's aneurysm to assess MMP's and their inhibitors TIMP's. It is hypothesized that patients receiving statin will have reduced MMP's.
An aneurysm is a permanent and localized dilatation of an artery usually more than 50% of its normal diameter. Abdominal Aortic Aneurysms (AAA) is an aneurysm of the main artery of abdomen and affects 5% of men aged 65-74 years. Rupture of an aneurysm is the 10th leading cause of death in white men over 65 years of age in industrial countries. Treatment of asymptomatic AAA is considered when the diameter of an AAA reaches 5.5 cm. There are two treatment options available: conventional open surgical repair or endovascular repair, which is a less invasive mode of treatment. After the operation heart and lung complications are significant in patients undergoing major abdominal surgery. The commonest causes of death are due to heart problems. There are various studies which have shown benefits of pre operative exercise training in patients undergoing orthopaedic, lung and heart bypass surgery. Currently, there is no data available with regards to the effect of pre-operative (before operation) supervised exercise in patients undergoing surgery for an AAA. The main aim of this study will be to determine whether a pre-operative supervised exercise programme improves post-operative (after operation) outcome, compared to standard treatment. Patients will be entered in the study once a decision to repair their AAA has been made by the consultant. They will undergo pre-operative assessment and will be divided randomly into two groups. One group will have exercise training for 4-6 weeks before surgery and the other will not. After the operation they will be followed during the post-operative period to determine the presence or absence of complications. It is anticipated that complications will be less in the group which has undertaken exercise training before operation.
The purpose of this study is to support the suspected expectation that Contrast enhanced Ultrasound (CUS) detects all endoleaks that have been detected by Computed Tomography (CT), and also find a number of leaks missed by CT. The investigators' primary goal is to detect no difference between CT and CUS and provide evidence that CUS is a possible alternative to CT.
This study will be a cross-sectional survey of interobserver variability associated with contrast enhanced ultrasound (CEUS) to detect endoleaks using computed tomographic angiography (CTA) as the practice standard. The investigators will enroll 40 consecutive patients undergoing endovascular abdominal aortic aneurysm repair (EVAR). At the first follow-up visit after the procedure, participants will undergo two abdominal ultrasound examinations with and without contrast, and one CTA. Analyses will be conducted to examine interobserver variability in the detection and characterization of endoleaks using contrast-enhanced ultrasound (CEUS). Other endpoints include examination of sensitivity and specificity of CEUS compared to CTA, and characterization of the number and types of endoleaks detected.