Question

microscopic examination of the heart from a patient who died one hour following a myocardial infarction would be expected to show which of the following?
granulation tissue
acute inflammatory cells
no visible change
eosinophilic cytoplasm and nuclear pyknosis

Explanation:

• Granulation tissue appears later in the healing process (days - weeks), not one hour after myocardial infarction.
• Acute inflammatory cells start to infiltrate a bit later (not immediately at one - hour mark).
• Eosinophilic cytoplasm and nuclear pyknosis (signs of cell death) also take some time (a few hours) to become visible microscopically.
• In the first hour after myocardial infarction, there may be no visible change under the microscope as the cellular and tissue - level changes that are microscopically detectable take a bit of time to develop.

Answer:

No visible change