Acute Myocardial Infarction
Acute Myocardial Infarction - Related Videos
07:45
Acute Myocardial Infarction in Rats
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Cited by 103 •
2011
The rat model of acute myocardial infarction (AMI) is useful to study the consequence of a MI on cardiac pathophysiological and physiological function.
14:19
Primary Outcome Assessment in a Pig Model of Acute Myocardial Infarction
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Cited by 13 •
2016
Reliable and accurate outcome assessment is the key for translation of preclinical therapies into clinical treatment. The current paper describes how to assess three clinically relevant primary outcome parameters of cardiac performance and damage in a pig acute myocardial infarction model.
09:45
Histological Quantification of Chronic Myocardial Infarct in Rats
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Cited by 14 •
2016
The post-mortem assessment of myocardial infarction (MI) in rodents is based on quantification of the infarct on stained heart sections. We describe an accurate method to quantify the infarct size using systematic sampling of harvested rat hearts from base to apex and image analyses of trichrome-stained histological sections.
12:03
Myocardial Infarction and Functional Outcome Assessment in Pigs
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Cited by 52 •
2014
This protocol describes the porcine myocardial infarction (MI) model using a 90 min closed-chest coronary balloon occlusion of the left anterior descending artery (LAD), followed by reperfusion. Furthermore, the protocol for several outcome parameters, such as cardiac function, hemodynamics, microvascular resistance, and infarct size, are also presented.
08:23
LAD-Ligation: A Murine Model of Myocardial Infarction
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Cited by 81 •
2009
This video demonstrates how to use a fast and reliable model to study pathobiological and pathophysiological processes of myocardial ischemia.
FAQs
Once an atherosclerotic plaque ruptures, it can activate platelets at the damaged site. Those platelets contribute to thrombus formation, and the growing clot may obstruct a coronary artery. This sequence links plaque disruption to reduced delivery of oxygenated blood and helps explain why the event can progress rapidly without timely clinical intervention.
The duration of oxygen deprivation matters because prolonged deprivation produces irreversible injury to cardiac muscle. This time dependence makes prompt recognition and treatment clinically important: delaying restoration of blood flow can allow myocardial damage to advance and may worsen the effects on survival and long-term cardiac function.
Platelet activation converts plaque disruption into a process that can enlarge the obstruction inside a coronary artery. As a thrombus forms, blood flow to downstream cardiac muscle may become increasingly restricted, intensifying myocardial ischemia. This mechanism explains why the initial vascular injury and the resulting clot are both important therapeutic targets in AMI.
These clinical elements provide complementary evidence rather than serving as isolated findings. Symptoms can prompt concern, electrocardiography evaluates the heart's electrical pattern, and cardiac biomarkers help indicate myocardial injury. Integrating them supports identification of infarction and helps clinicians select an appropriate, time-sensitive management strategy.
Rapid reperfusion therapy aims to restore blood flow to ischemic cardiac muscle before oxygen deprivation causes more irreversible injury. Its urgency follows directly from the time-sensitive nature of myocardial damage. In clinical management, assessment findings help guide this intervention, with the goal of limiting injury and improving subsequent cardiac outcomes.
Understanding the plaque, platelet, and thrombus sequence provides a basis for risk-factor prevention as well as acute care. Prevention focuses on reducing the likelihood that the underlying vascular process will progress to an obstructive event. This broader approach connects emergency management with efforts to reduce future myocardial injury and improve long-term health.
AMI research examines how to limit myocardial damage after blood flow is reduced or blocked and how to improve survival after the event. It also addresses preservation of long-term cardiac function. These goals extend beyond identifying infarction, linking mechanistic knowledge with better reperfusion strategies, preventive care, and recovery outcomes.