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Myocardial Infarction Pathology
- Up to 18 hours usually no change
- 24-48 hours
- macroscopic
- microscopic
- oedema
- acute inflammatory cell infiltration
- necrosis of myocytes
- 3-4 days
- macroscopic
- yellow rubbery centre with haemorrhagic border
- microscopic
- obvious necrosis and inflammation
- early granulation tissue
- 1-3 weeks
- macroscopic
- infarcted area paler and thinner than unaffected ventricle
- microscopic
- granulation tissue then progressive fibrosis
- 3-6 weeks
- macroscopic
- silvery scar becoming tough and white
- microscopic
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