The predominant cell after 72 hours of myocardial infarction-

Acute inflammatory> reaction with a predominance of Neutrophils is seen upto 2-3 days. After 3 days (Le. after 72 hours Macrophages become the predominant cell type and become involved in the removal of necrotic debris. In myocardial infarction. Neutrophils appear at → 12-24 hrs. Granulation tissue appear at → 6-10 days The beginning of fibrosis and → 7-14 days organization of granulation tissue Development of fibrous scar (hearing) → 2-6 weeks