Active clinical trials for "Myocardial Infarction"

OBJECTIVE: To determine whether a therapeutic strategy involving low-dose intracoronary fibrinolytic therapy with reteplase infused after coronary reperfusion will reduce the myocardial infarction size. DESIGN, SETTING, AND PARTICIPANTS: 306 patients presenting at 15 hospitals in China within 12 hours of acute ST-segment elevation myocardial infarction (STEMI) due to a proximal-mid-vessel occlusion of left anterior descending (LAD) coronary artery occlusion will be randomized in a 1:1:1 dose-ranging trial design. Patients will be followed up to 1 month. INTERVENTIONS: Participants will be randomly assigned to treatment with placebo (n = 102), reteplase 9mg (n = 102), or reteplase 18mg (n = 102) by manual infusion over 2 minutes after reperfusion of the infarct-related coronary artery and before stent implant. MAIN OUTCOMES AND MEASURES The primary outcomewas the myocardial infarct size (% left ventricular mass) demonstrated by contrast-enhanced cardiac magnetic resonance imaging (MRI) conducted from days 2 through 7 after enrollment.

The main purpose of this research study is to try to improve the results of the standard treatment for heart attacks. Normally, heart attack patients get a fast dose and a slow dose of eptifibatide in the emergency room, shortly after arriving. This drug is usually given through a vein in the arm. However, eptifibatide can also be injected directly into the heart's blood supply just before angioplasty, a common procedure to unblock a blood vessel in the heart. This new way of giving the drug is being studying.

Distal embolization can occur during coronary angioplasty performed in the acute phase of myocardial infarction and is associated with poor long-term outcome. We hypothesize that the use of a system allowing thrombus aspiration before angioplasty and stent implantation will limit infarct size and its severity.

Acute Myocardial Infarction (AMI) is a major disease that endangers people's health China. At present, clinical emphasis is given to "treatment" rather than "prevention", and a large number of AMI patients are hospitalized repeatedly without systematic and standardized health management after acute stage, falling into a vicious circle of "treatment without recovery". Nurse-led case management based on multidisciplinary collaboration is a new mode of disease management. In 1994, the United States took the lead in applying case management to the acute and chronic care system, providing comprehensive care services and promoting comprehensive recovery through multidisciplinary collaboration led by case managers. At present, the case management model of cardiovascular disease in Europe and the United States has been mature, but it is still in the exploratory stage in China. Through the establishment and application of nurse-led AMI case management program based on multidisciplinary collaboration, this study wants to establish a novel, standardized, and easy to popularize AMI whole-course prevention and control mode, providing theoretical and research basis for AMI disease management.

This study is a prospective multicenter observational study for external validation and model advancement of a deep learning based 12-lead electrocardiogram analysis algorithm targeting adult patients presenting to the emergency department with chest pain and acute myocardial infarction equivalent symptoms. About 9,000 adult patients will be enrolled at 20 emergency medical centers in Korea. Artificial intelligence algorithms are manufactured by Medical AI Co., Ltd. It is an advanced version based on the model developed and published in 2020. It had the diagnostic performance of area under the receiver operating curve 0.901 and 0.951 for acute myocardial infarction and ST-segment elevation myocardial infarction, respectively. The primary endpoint is a diagnosis of acute myocardial infarction on the day of the emergency center visit, and the secondary endpoint is a 30-day major adverse cardiac event. From March 2022, patient registration will begin at centers that have been approved by the Institutional Review Board. This is the first prospective multicenter emergency department validation study for a 12-lead electrocardiogram artificial intelligence algorithm to diagnose acute myocardial infarction. This study will give insight into the direction of future development by verifying whether the deep learning algorithm works well for patients visiting the real-world adult emergency medical center.

Nutrition is capable of altering the cardiovascular health of the general population. However, the ideal food and nutritional interventions for the secondary prevention of cardiovascular brain disease and for cardiac rehabilitation are still far from being defined, given the lack of scientific evidence in this specific population of individuals with atherosclerotic disease. This work aims to demonstrate that an intensive program will improve cardiovascular risk predictor parameters, such as high systolic blood pressure, altered lipid and glucose profile, used in the SMART Risk Score tool. In this 12-week clinical study with two arms running in parallel, individuals referred to a cardiac rehabilitation program will receive either an intensive food and nutrition intervention program with nutrition consultations, in which the adoption of the Mediterranean diet is promoted, with contacts telephone calls, short text messages, consultation support tools, podcasts, free access short videos, culinary medicine sessions and nutrition "workshops", or the standard of care program recommended in the Nutritional Support Protocol of the Cardiac Rehabilitation Program. At the beginning of the study, at 4 weeks, at 8 weeks and at 12 weeks, blood and urine samples will be collected, body composition, blood pressure, adherence to the Mediterranean dietary pattern will be assessed, by applying the PREDIMED questionnaire and the dietary intake of 24h previous. The quality of life of individuals will be assessed by the EQ-5D-5L questionnaire at the beginning and at the end of the study. It is expected that the increased intensity and support from the intensive program will have a significant impact on the various metabolic and inflammatory markers predictive of cardiovascular risk and that these observed changes will result in a decreased 10-year risk of developing acute myocardial infarction, stroke or vascular death. On the other hand, the intervention is intended to improve quality of life, improve weight control and assess the impact it has on adherence to the Mediterranean dietary pattern.

Assess whether excimer laser coronary atherectomy (ELCA) before direct infarct-related artery (IRA) stenting results in improved reperfusion success in patients presenting with acute ST wave elevation myocardial infarction (STEMI) and angiographically evident thrombus. Validate an ELCA technique for the treatment of STEMI, at high-volume centers experienced in the treatment of acute myocardial infarction (AMI).

Patients who have survived a myocardial infarction (MI) are at increased risk for sudden cardiac death (SCD) caused by ventricular tachycardia and ventricular fibrillation. A severely reduced left ventricular ejection fraction (LVEF) as a rough overall measure of impaired heart function after MI was shown to indicate a higher risk for SCD. Based on this observation, two landmark randomised trials, MADIT II and SCD-HeFT, were conducted between end of the 1990s and early 2000s. These trials compared the survival of patients with severely reduced LVEF who received an implantable cardioverter-defibrillator with the survival of patients being on medical therapy alone. They reported a significantly better survival of patients in the defibrillator arm and led to international guideline recommendations for routine implantation of defibrillators in survivors of MI with severely impaired LVEF as a means for primary prevention of SCD. Since then, the management of these patients has changed dramatically with the advent of a series of novel drug classes that reduce not only mortality but specifically SCD leading to a substantial decrease of the sudden death rates as well as of the rates of appropriate defibrillator therapies implanted for primary prevention of SCD. At the same time, the complication rates associated with the defibrilllator therapy remain significant without obvious decrease. Thus, the risk-benefit of routine defibrillator implantation for primary prevention of SCD in patients with severely reduced LVEF has substantially changed since the conduction of the landmark trials that established this therapy. Due to the inherent risks and considerable costs of the defibrillator, a novel randomised adequately powered assessment of the potential benefit or harm of the defibrillator in survivors of MI with reduced LVEF under contemporary optimal medical treatment (OMT) appears imperative. OBJECTIVE: To demonstrate that in post-MI patients with symptomatic heart failure who receive OMT for this condition, and with reduced LVEF ≤ 35%, OMT without ICD implantation (index group) is not inferior to OMT with ICD implantation (control group) with respect to all-cause mortality.

Despite the use of guideline directed optimal medical therapy, 12% of patients with stable coronary heart disease and 18% of patients with recent acute coronary syndrome experience recurrent major adverse cardiovascular events 1. The risk of recurrent cardiovascular events may be related to persistent elevation of thrombin beyond the index event 2,3 which leads to progression of cardiovascular disease by inducing inflammation, endothelial dysfunction and thrombosis 4. In patients with coronary heart disease, vitamin K antagonists (VKAs) and direct oral anticoagulants (DOACs) have been explored as secondary prevention strategies and have shown cardiovascular benefits at the cost of higher bleeding events 5,6,7,8. howeverLeft ventricular thrombus (LVT) usually appearswithin 1 month after ST-segment elevation myocardial infarction (STEMI) and mostlyforms after anterior STEMI.9,11Although the prevalenceof LVT after acute myocardial infarction hasdecreased dramatically in modern times due to the progress of reperfusion therapy, LVT incidence in patients with anterior STEMI remains at 4% to 26%.10,12 It complicates acute myocardial infarction and is associated with a higher incidence of poor outcomes.9

This is a prospective observational study of consecutive patients presenting with STEMI to the Prince of Wales Hospital over a 12-month period. All patients will receive standard of care including reperfusion and GDMT irrespective of study enrolment. Patient will be followed for 9 months after enrolled in this study. Point-of-care ultrasound (POCUS) using a hand-held ultrasound (Vscan, GE Healthcare) will be performed to assess baseline LVEF within 48 hours of admission. Patients with baseline moderate-to-severe LV dysfunction by visual POCUS assessment (i.e. LVEF <40%) will be recruited for follow-up LVEF assessment at 3 months. Patients with persistent LVEF <40% by POCUS will undergo formal echocardiography to confirm LVEF by either 2D area (Simpson's rule) and 3D volumetric measurements. In 9 month visit, patient's clinical data will be collected and no echo is needed during this visit.