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22 Cards in this Set
- Front
- Back
First 2-4 hours
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No visible change
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First 1-2 hours
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Contraction bands
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After 4 hours
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Early coagulative necrosis
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When do PMNs begin to emigrate?
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After 4 hours
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When is accute inflammation at its peak?
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From 2 to 4 days after the MI
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When is hyperemia seen?
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From 2 to 4 days after the MI
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When does muscle show massive coagulative necrosis?
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From 2 to 4 days after the MI
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When does a hyperemic border appear?
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From 5 to 10 days after the MI
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When does the heart become soft and yellow-brown?
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From 5 to 10 days after the MI
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When is there greatest risk of rupture (of the wall, papillary muscles, or ventricular septa)?
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From 5 to 10 days after the MI
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What causes risk of rupture in post-MI patients?
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Macrophages degrading structural components
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What is the outer zone and when is it seen?
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It is an ingrowth of granulation tissue that appears betwee 5 and 10 days after the MI
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When does the artery recanalize?
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7 weeks after the MI
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When is the contracted scar complete?
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7 weeks after the MI
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What are the 1st, 2nd and 3rd most common sites for coronary artery occlusion?
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LAD > RCA > circumflex
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When is risk of ventricular aneurysm greatest?
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7 weeks after the MI
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When is risk of arrhythmia greatest?
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From 2 to 4 days after the MI
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When does Dressler's syndrome occur?
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Several weeks post-MI
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When does fibrinous pericarditis occur?
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3-5 days post-MI; or several weeks post-MI due to Dressler's syndrome, an autoimmune fibrinous pericarditis
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What are possible complications of MI?
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Arrhythmia, LV failure, pulmonary edema, shock; rupture leading to tamponade, severe MR, VSD; aneurysm leading to decreased CO, risk of arrhythmia, embolus from mural thrombus; fibrinous pericarditis; Dressler's syndome (autoimmune)
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What is the best marker for MI?
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Troponin. It rises early (4 hours post-MI) and stays elevated (7-10 days), and is specific to the heart
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Causes of dilated (congestive) cardiomyopathy
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Chronic alcohol, wet Beriberi, Coxsackie B virus myocarditis, chronic cocaine use, Chaga's disease, doxorubicin toxicity, peripartum cardiomyopathy
"A,B,C,C,C,D" |