Final answer:
Prominent granulation tissue with neovascularization after a myocardial infarction typically becomes visible within a few days to weeks during the tissue repair phase.
Step-by-step explanation:
After a myocardial infarction (M.I.), prominent granulation tissue with neovascularization is histologically evident during the tissue repair phase of healing. Following the initial inflammatory phase, angiogenesis (the growth of new blood vessels) takes place leading to the formation of granulation tissue as part of the repair process. This is a critical step, during which fibroblasts deposit collagen and extracellular matrix, and new blood vessels are formed to vascularize the new tissue. The granulation tissue then begins to form a scar as it matures. Typically, granulation tissue with neovascularization can be seen within a few days to weeks after an M.I.