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6 Cards in this Set
- Front
- Back
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0 - 4 hours
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Gross - None
LM - None Risk - Arrhythmia |
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4 - 12 hours
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Gross - Dark mottling; pale with tetrazolium stain
LM - Early coagulative necrosis, edema, hemorrhage, wavy fibers Risk - Arrhythmia |
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12 - 24 hours
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Gross - Dark mottling; pale with tetrazolium stain
LM - Contraction bands, release of necrotic cell content into blood, beginning of neutrophil emigration Risk - Arrhythmia |
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2 - 4 days
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Gross - Hyperemia
LM - Extensive coagulative necrosis, tissue surrounding infarct shows acute inflammation, neutrophil emigration Risk - Arrhythmia |
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5 - 10 days
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Gross - Hyperemic border, central yellow-brown softening, maximally yellow and soft by 10 days
LM - Granulation tissue appears at margins Risk - Free wall rupture, tamponade, papillary muscle rupture, interventricular septal rupture due to macrophages that have degraded important strctural components |
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7 weeks
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Gross - Recanalized artery, gray-white scar tissue
LM - Contracted scar complete Risk - Ventricular aneurysm |
