View clinical trials related to Myocardial Infarction.
Filter by:To place two different everolimus-eluting stents (EES), a bioabsorbable polymer EES (Synergy®) and a permanent-type polymer EES (Xience®), randomly to the ST-elevation acute myocardial infarction (AMI) and to observe and compare the early and chronic vascular responses using the frequency domain optical coherence tomography (FD-OCT). The primary endpoint is the 2-week strut coverage rate by FD-OCT.
The study aims to investigate whether oral betablocker (BB) therapy is superior to no such treatment following an acute myocardial infarction (AMI).
The aim of the study is to examine whether treatment with extracorporeal life support (ECLS) in addition to revascularization with percutaneous coronary intervention (PCI) or alternatively coronary artery bypass grafting (CABG) and optimal medical treatment is beneficial in comparison to no ECLS in patients with severe infarctrelated cardiogenic shock with respect to 30-day mortality
The EMERALD II study is a multinational, multicenter, and retrospective study. ACS patients who underwent CCTA from 1 months to 3 years prior to the event will be retrospectively identified. Plaques in the non-culprit vessels will be regarded as a primary control group.
The purpose of this clinical study is to collect data to substantiate the use of the VITROS hs Troponin I test as an aid in the diagnosis of myocardial infarction (MI). The test is further indicated for risk stratification of mortality, myocardial infarction or coronary revascularization in patients with acute coronary syndrome.
The aim of the study is to assess whether a decision aid that is currently used in hospitals across Greater Manchester to determine how likely it is that a patient has a serious heart problem is still accurate in the pre-hospital environment.
The purpose of this study is to evaluate the safety of reducing dual antiplatelet therapy (DAPT) duration to 1 month after implantation of the everolimus-eluting cobalt-chromium stent (CoCr-EES) under the setting of acute coronary syndrome (ACS).
In acute myocardial infarction, early restoration of epicardial and myocardial blood flow is of paramount importance to limit infarction size and create optimum conditions for favourable long-term outcome. Currently, restoration of epicardial blood flow is preferably and effectively obtained by primary percutaneous coronary intervention (PPCI). After opening the occluded artery, however, the reperfusion process itself causes damage to the myocardium, the so called "reperfusion injury". The phenomenon of reperfusion injury is incompletely understood and currently there is no established therapy for preventing it. Contributory factors are intramyocardial edema with compression of the microvasculature, oxidative stress, calcium overload, mitochondrial transition pore opening, micro embolization, neutrophil plugging and hyper contracture. This results in myocardial stunning, reperfusion arrhythmias and ongoing myocardial necrosis. There is general agreement that a large part of the cell death caused by myocardial reperfusion injury occurs during the first few minutes of reperfusion, and that early treatment is required to prevent it. Myocardial hypothermia may attenuate the pathological mechanisms mentioned above. However, limited data are available on the beneficial effects of hypothermia to protect the myocardium from reperfusion damage. In animals, several studies demonstrated a protective effect of hypothermia on the infarction area. This effect was only noted when hypothermia was established before reperfusion. Hypothermia is therefore thought to attenuate several damaging acute reperfusion processes such as oxidative stress, release of cytokines and development of interstitial or cellular edema. Furthermore, it has been shown that induced hypothermia resulted in increased ATP-preservation in the ischemic myocardium compared to normothermia. The intracoronary use of hypothermia by infused cold saline in pigs was demonstrated to be safe by Otake et al. In their study, saline of 4°C was used without complications (such as vasospasm, hemodynamic instability or bradycardia) and it even attenuated ventricular arrhythmia significantly. Studies in humans, however, have not been able to confirm this effect, which is believed to be mainly due to the fact that the therapeutic temperature could not reached before reperfusion in the majority of patients or not achieved at all. Furthermore, in these studies it was intended to induce total body hypothermia, which in turn may lead to systemic reactions such as shivering and enhanced adrenergic state often requiring sedatives, which may necessitate artificial ventilation. In fact, up to now any attempt to achieve therapeutic myocardial hypothermia in humans with myocardial infarction, is fundamentally limited because of four reasons: 1. Inability to cool the myocardium timely, i.e. before reperfusion 2. Inability to cool the diseased myocardium selectively 3. Inability to achieve an adequate decrease of temperature quick enough 4. Inability to achieve an adequate decrease of temperature large enough Consequently, every attempt to achieve effective hypothermia in ST-segment myocardial infarction in humans has been severely hampered and was inadequate. In the last two years, the investigators have developed a methodology overcoming all of the limitations mentioned above. At first, the investigators have tested that methodology in isolated beating pig hearts with coronary artery occlusion and next, the investigators have tested the safety and feasibility of this methodology in humans. Therefore, the time has come to perform a proof-of-principle study in humans, which is the subject of this protocol.
The study aim is to evaluate the capability of mechanocardiography in detecting acute myocardial ischemia in patients suffering evolving ST-segment elevation infarction.
This study aims to compare the acute thrombogenecity and frequency of neoatherosclerotic lesions and other aspects of long term arterial healing such as the frequency of malapposed and uncovered stent struts at 3 years among patients treated with either a biodegradable polymer everolimus-eluting stent (Synergy) or a durable polymer everolimus-eluting stent (Xience Alpine) for STEMI.