Active clinical trials for "Infarction"

Evaluation of fractional flow reserve (FFR) is a key method for assessing ischemia with a view to guiding revascularization strategy following acute coronary syndrome. A stenosis that appears to be severe by angiography may cause limited ischemia (with an FFR value >0.80) due to the incapacity of the necrotic zone to achieve physiological hyperemia, i.e. maximal coronary flow. Recently, it has been demonstrated that absolute coronary flow, and micro- and macrovascular resistance, as measured by a thermodilution technique, using the Rayflow microcatheter (Hexacath) are strongly associated with myocardial mass. In extensive necrosis, there is a loss of myocardial mass, and these tools could be of potential interest in measuring myocardial viability, which reflects the extent of remaining viable myocardial mass. Therefore, this study aims to investigate the relationship between both absolute coronary flow and microvascular resistance, and myocardial viability assessed by MRI. In a prospective, single-centre, interventional study, we will compare absolute coronary flow and microvascular resistance in the left anterior descending artery, in patients with and without a history of ST segment elevation MI.

Acute myocardial infarction(AMI) is the most serious manifestation of coronary artery disease. AMI is characterized by high mortality, high disability, and high cost. However, multicenter research on AMI with large sample size in Tianjin or even China is limited. By including AMI in 36 hospitals,this multicenter study will capture the changes in epidemiological trends ,analyze the status of treatment in Tianjin, and explore the best treatment strategies.

This study evaluates long-term outcome of patients diagnosed as acute myocardial infarction and treated with medication, coronary artery bypass surgery and percutaneous coronary intervention in Asan medical center, Korea.

Heart failure (HF) is an enormous health burden affecting approximately 5.1 million people in the US and is the cause of 250,000 deaths each year. Approximately 50% of HF is caused by myocardial ischemia and requires immediate restoration of coronary blood flow to the affected myocardium. However, the success of reperfusion is partly limited by intramyocardial hemorrhage, which is the deposition of intravascular material into the myocardium. Hemorrhagic reperfusion injury has high prevalence and patients have a much greater risk of adverse left ventricular remodeling, risk of fatal arrhythmia, impaired systolic function and are hospitalized at a greater rate. Recent magnetic resonance imaging techniques have improved assessment of reperfusion injury, however, the association between MRI contrasts and reperfusion injury is highly unclear, and lacks specificity to IMH. Improved imaging of IMH and accurate knowledge about its spatial and temporal evolution may be essential for delivery of optimal medical therapy in patients and critical to identify patients most at risk for adverse ventricular remodeling. The overall goal is to investigate the magnetic properties of hemorrhage and develop MRI techniques with improved specificity to hemorrhage. New MRI techniques permit noninvasive assessment of the magnetic susceptibility of tissues and can target tissue iron. Therefore, the investigators hypothesize that MRI imaging of myocardial magnetic susceptibility can map hemorrhagic myocardium. The investigators will perform a longitudinal observational study in patients after reperfusion injury to validate these methods, compare the methods with conventional MR contrasts and develop MR methods for imaging humans.

This is a randomized, double-blind study. Human umbilical cord mesenchymal stem cells (hUC-MSC) will be treated on cerebral infarction patients, and evaluates their neurological function of convalescent period.

The Stroke Recovery Initiative is a nation-wide participant recruitment registry that connects people who have had a stroke with researchers who are working to develop new approaches to improve recovery after stroke.

Despite progress in pre-hospital care, ambulance logistics, pharmacotherapy and PPCI techniques, ST-segment elevation myocardial infarction (STEMI) continues to confer a substantial burden of morbidity and mortality. Within the STEMI population, there is a spectrum of higher and lower risk patients. The aim of this cohort study is to collect prospectively and systematically clinical research data from STEMI patients. This cohort study is an open-end observational study to identify master switches in myocardial ischemia.

This study has been added as a sub study to the Simulation Training for Emergency Department Imaging 2 study (ClinicalTrials.gov ID NCT05427838). The purpose of the study is to assess the impact of an Artificial Intelligence (AI) tool called qER 2.0 EU on the performance of readers, including general radiologists, emergency medicine clinicians, and radiographers, in interpreting non-contrast CT head scans. The study aims to evaluate the changes in accuracy, review time, and diagnostic confidence when using the AI tool. It also seeks to provide evidence on the diagnostic performance of the AI tool and its potential to improve efficiency and patient care in the context of the National Health Service (NHS). The study will use a dataset of 150 CT head scans, including both control cases and abnormal cases with specific abnormalities. The results of this study will inform larger follow-up studies in real-life Emergency Department (ED) settings.

Over the last two decades, considerable progress has been made in the management of Acute Myocardial Infarction (AMI), both in the acute phase and in monitoring beyond the hospital phase. Nevertheless, the evolution of care practices and their impact on the mid- and long-term prognosis of patients admitted to the intensive care unit for acute myocardial infarction remain relatively little studied exhaustively. The aim of this study is to assess the profile of AMI patients, their management and follow-up in order to evaluate the relationship between these factors and outcomes.

The objective of this study is to compare the clinical outcome of Non-ST-elevation myocardial infarction (NSTEMI) and ST-elevation myocardial infarction (STEMI) patients with non-obstructive, non-culprit coronary lesions and either presence or absence of vulnerable plaque characteristics as assessed by optical coherence tomography (OCT).