A 60-year-old woman developed chest pain that persisted for 4 hours. A radiographic imaging procedure showed an apparent myocardial infarction involving a 3 × 4 cm area of the posterior left ventricular free wall.Laboratory findings showed serum creatine kinase of 600 U/L. The patient received anti-arrhythmic and pressor agents to treat the decreasedcardiac output while in the hospital. Which of the following pathologic findings would most likely be seen in the left ventricle 1 month later?
Answer : D Fibrous scar
The elevated creatine kinase level indicates that myocardial necrosis has occurred. The destruction of myocardial fibers precludes complete resolution.
The area of myocardial necrosis is gradually replaced by a fibrous scar. Liquefactive necrosis with abscess formation is not a feature of ischemic myocardial injury.
Coagulative necrosis is typical of myocardial infarction, but after 1 month, a scar would be present.
Nodular regeneration is typical of hepatocyte injury because hepatocytes are stable cells.