Myocardial Protection Strategy
Myocardial Protection Strategy - 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.
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.
08:22
In vitro Assessment of Myocardial Protection following Hypothermia-Preconditioning in a Human Cardiac Myocytes Model
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Cited by 1 •
2020
The distinct effects of different degrees of hypothermia on myocardial protection have not been thoroughly evaluated. The goal of the present study was to quantify the levels of cell death following different hypothermia treatments in a human cardiomyocyte-based model, laying the foundation for future in-depth molecular research.
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.
07:40
Protection of H9c2 Myocardial Cells from Oxidative Stress by Crocetin via PINK1/Parkin Pathway-Mediated Mitophagy
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Cited by 4 •
2023
Based on in vitro experiments, this study revealed the mechanism of crocetin in repairing oxidative stress damage of cardiomyocytes by influencing mitophagy, in which the PINK1/Parkin signaling pathway plays an important role.
FAQs
Cardioplegia and hypothermia protect the myocardium through complementary effects. Cardioplegia arrests the heart, while hypothermia lowers metabolic demand, reducing oxygen requirements during interrupted or reduced coronary flow. Used together, they limit the mismatch between cellular energy needs and available supply. This coordinated approach is intended to preserve cellular integrity and support contractile function after the operation.
These variables determine how the protection strategy is applied during the period of reduced or interrupted coronary blood flow. The selected solution, temperature, delivery route, and timing must work together with cardioplegia, hypothermia, and controlled perfusion. Careful selection is central to operative management because inadequate coordination could compromise the intended preservation of myocardial integrity and function.
Reducing ischemia-reperfusion injury addresses damage associated with restoring blood flow after a period of limited or interrupted coronary circulation. Myocardial protection therefore extends beyond lowering oxygen consumption during the procedure. Combining cardioplegia, hypothermia, controlled perfusion, and other protective measures is intended to maintain cellular integrity and improve the heart’s contractile recovery afterward.
Controlled perfusion provides another planned component of myocardial protection during cardiac surgery. Rather than relying on a single intervention, the strategy coordinates perfusion with heart arrest and reduced temperature to manage the conditions experienced by the myocardium. Its relevance lies in supporting the broader goal of limiting ischemic stress while preserving cellular integrity and subsequent contractile function.
Planning focuses on matching the protective approach to the operative circumstances, with particular attention to the cardioplegic solution, temperature, delivery route, and timing. The plan may also incorporate controlled perfusion and measures directed at ischemia-reperfusion injury. Considering these elements together helps clinicians organize protection during procedures in which coronary blood flow is reduced or interrupted.
This strategy is particularly relevant during cardiac surgery that temporarily challenges coronary blood flow. The overview identifies valve repair and coronary artery bypass surgery as important examples. In these settings, planned myocardial protection helps manage the period of operative stress, with the objective of preserving heart muscle and supporting recovery of contractile function after the procedure.
Successful protection can help preserve myocardial cellular integrity and contractile function during and after surgery. These outcomes matter because the heart must recover from a period of reduced or interrupted coronary blood flow. In procedures such as valve repair or coronary artery bypass surgery, the overall aim is improved postoperative recovery through coordinated control of metabolic demand, perfusion, and reperfusion-related stress.