View clinical trials related to Myocardial Ischemia.
Filter by:The purpose of this study is to determine whether stress echocardiography or computed tomography (CT) of the heart is better at diagnosing emergency room chest pain patients to select appropriate candidates for hospitalization and further work-up.
The aim of the present study was to assess the efficacy of thoracic epidural anesthesia followed by postoperative epidural infusion and patient-controlled epidural analgesia with ropivacaine/fentanyl in off-pump coronary artery bypass grafting
Previous studies indicate that patients with cardiovascular disease have a variable response to aspirin. Despite treatment with aspirin a large number of patients suffer a myocardial infarction. This has given rise to the phenomenon "aspirin low-responsiveness". Laboratory aspirin low-responsiveness can be defined as the failure of aspirin to inhibit platelet production of thromboxane A2 or inhibit thromboxane-dependent platelet aggregation. Whether a low platelet response to aspirin results in an increased risk of future thrombotic events is of great clinical significance, but is still unknown. The investigators hypothesize that patients with a reduced response to aspirin, determined by platelet aggregation using the apparatus Verify Now Aspirin and Multiplate, have a higher risk of thrombosis. The purpose of this study is to investigate whether a higher incidence of cardiovascular events is found in patients with coronary artery disease (CAD) having a reduced biochemical response to aspirin compared with CAD patients having a normal biochemical response to aspirin. In addition to CAD, all patients have at least one of the following risc factors: previous myocardial infarction, type 2 diabetes mellitus and/or renal insufficiency.
This multicentre, open-label, single-arm Study is to evaluate the effect of Rosuvastatin 20 mg 76 weeks on coronary atherosclerosis plaque versus baseline in Chinese coronary heart disease (CHD) patients with hyperlipidemia by measuring the plaque volume using a 64 slice spiral CT. Effect on blood lipids, hsCRP and Carotid intima-media thickness (CIMT) is also evaluated.
Ionizing radiation has a number of harmful effects in humans. The most important among these is the induction of cancer. It is assumed that damage to DNA in the nucleus of a single cell can induce cancer. Among the different types of lesions inducted, DNA double-strand breaks (DSBs) are considered to be the most relevant effects that can initiate carcinogenesis. The investigators are already conducting several other studies to prospectively compare the inducted DSBs by coronary CT-angiography and conventional coronary angiography. Extending these examinations to investigate the induced DSBs by myocardial scintigraphy allows a comparison of all three relevant imaging methods of the heart that incorporate ionizing radiation. To evaluate this, the investigators are planning to examine patients who are scheduled for a clinically indicated myocardial scintigraphy. These examinations are routinely done by the Department of Nuclear Medicine in either a 1-day or a 2-day protocol according to the diagnostic reference values of the Federal Department for Radiological Protection. Blood samples will be taken from these patients at predefined time steps before and after the examination and DNA double-strand breaks will be determined from these blood samples specifically considering the applied activity of the tracer and the exposition kinetics.
The main purpose of this study is to compare myocardial perfusion imaging using Rubidium-82 PET with Tc-99m-MIBI SPET, in the evaluation of significant Coronary Artery Disease (CAD).
Some myocardial infarctions (MI) occur as the first manifestation of atherosclerotic disease. Such MIs are important because of the high likelihood of missed opportunities for prevention. A recent analysis using CALIBER data estimated this proportion at 60%. Further to this research, another level of complexity can be added to improve our understanding of these MIs. This is the concept of a completely 'unanticipated' MI, which can be defined as: MI occurring as the first manifestation of atherosclerotic disease and without any traditional cardiovascular risk factors and without any prior chest pain. Such 'unanticipated' MIs cannot be foreseen by the medical profession and their frequency in the population is unknown. Therefore the aim of this study is to describe the distribution of previously diagnosed cardiovascular disease, cardiovascular risk factors and chest pain in patients with first MI. This will provide an estimate of the number of 'unanticipated' MIs and of the levels of risk factors in unheralded, compared to heralded MI.
The aim of this study is to determine whether a pre-treatment with high-dose statin (one day prior and just before intervention, rosuvastatin 20mg/day) has a positive impact on the occurrence of periprocedural myocardial infarction during percutaneous coronary intervention (PCI).
The first aim of this trial is to assess the long-term prognostic value of Omega-3 index, which is a measure of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) relative to other fatty acids in the erythrocyte membrane, in an unselected, regional multicenter observational study of 982 chest pain patients admitted to the emergency unit, employing blood samples collected at admission. The second purpose of this study is to evaluate the prognostic utility of vitamin D in the same population. The third purpose of this study is to assess the incremental prognostic value of B-type natriuretic peptide (BNP) and high-sensitive C-reactive protein (hsCRP).
Vascular effects evaluation after non-polimeric and polimeric paclitaxel stent implantation.In particular the investigators will use Taxus )as a polimeric stent)and Axxion (as a non-polimeirc)stent system. The investigators will look at late stent malapposition by means of intracoronary ultrasound imaging technique (IVUS) at baseline and 9 months follow-up. The investigators sought to compare the two stent types with the same drug to verify the polimer role. The polimer itself seems to provoke inflammation and hypersensibility if the arterial wall and it seems to be the base of a process of positive remodeling found at drug eluting stent implantation site. This positive remodeling is the mechanism producing late stent malapposition which on its turn can determine stent thrombosis, as demonstrated by pathological studies. At the same time the investigators will study the incidence of clinical events like myocardial infarction, stent thrombosis, TLR and death along with the incidence of angiographic restenosis at 2 years follow up.