| Interstitial edema || 4–12 h || || || [[File:Histopathology of interstitial edema in myocardial infarction.jpg|190px]]
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| Coagulative necrosis: ‘nuclear changes’ || 12–24 (pyknosis, karyorrhexis) || 1–3 days (loss of nuclei) || Depends on size of infarction ||[[File:Histopathology of myocardial infarction with loss of nuclei.jpg|190px]]
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| Neutrophil infiltration || 12–24 h || 1–3 days || 5–7 days || [[File:Histopathology of neutrophil infiltration in myocardial infarction.jpg|190px]]