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24 Cards in this Set
- Front
- Back
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Gross morphologic finding at 18-24 hours after an infarction
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Pallor
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Gross morphologic finding at 24-72 h (1-3 d) post-MI
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Pallor with hyperemia (congestion)
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Gross morphologic finding at 3-7 d post-MI
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Hyperemic border w/ central yellowing
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Gross morphologic finding at 10-21 days post-MI
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Yellow and soft with vascular margins
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Gross morphologic finding at 7 weeks post-MI
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White (fibrotic)
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Microscopic morphologic finding at 1-3 hours post-MI
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Wavy fibers
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Microscopic morphologic finding at 2-3 hours post-MI
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Staining defect w/ basic fuschin & other dyes
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Microscopic morphologic finding at 4-12 hours post-MI
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Coagulative necrosis w/ loss of cross striations, CONTRACTION BANDS, edema, hemorrhage, early PMN infiltrate
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Microscopic morphologic finding at 18-24 hours post-MI
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Continued coagulative necrosis, pyknosis of nuclei, marginal CONTRACTION BANDS
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Microscopic morphologic finding at 3-7 days post-MI
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Macrophage and PMN infiltrate; fibrovascular response begins
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Microscopic morphologic finding at 24-72 hrs post-MI
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Total loss of nuclei & striations, heavy PMN infiltrate
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Microscopic morphologic finding at 10-21 days post-MI
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Granulation tissue
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Microscopic morphologic finding at 7 weeks post-MI
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White fibrosis
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When does a decrease in ATP & contractility occur in acute MI?
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1-2 min
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When does membrane depolarization & arrhythmia (ST-segment changes) occur in acute MI?
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10 min
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When does irreversible damage to myocardium begin in acute MI
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20 min
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When are wavy fibers seen in acute MI?
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1-3 hours
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When is PMN infiltrate first observed in acute MI?
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4-12 hours
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When are contraction bands first observed in acute mi?
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4-12 hours
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When does coagulative necrosis begin in acute MI?
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18-24 hours
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When does granulation tissue begin to form after acute MI?
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5-7 days
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When do macrophages begin to reabsorb dead tissue after acute MI?
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5-7 days
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When does ventricular remodeling begin to occur after actue MI?
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7+ days
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When is fibrosis & scarring complete following an acute MI?
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7 weeks
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