Histology Course S III 5 Departement of Pathology, University of Zurich Histokurs

S III 5 subacute myocardial infarction HE further information (German) on HiPaKu
  ICD-10: I21.4

75-year-old female, hospitalised for 2 weeks due to a small myocardial infarction. No complications during the hospital stay, discharge was planned for the next day when the patient suddenly collapsed. Resuscitation efforts were unsuccessful.

- Macroscopically: collapsed dark area in the interior layer of the left posterior wall with 90% stenosis of the proximal right coronary artery.
- Inner part of myocardium: degenerated muscle fibres. Loose connective tissue with several macrophages partly loaded with lipofuscin. Small clusters of lymphocytes. Wide, thin-walled blood vessels. Directly under the endocardium, a rim of muscle fibres remain.
- The outer layer is intact with mildly hypertrophied muscle fibres. Epicardium lacks noticeable changes.