Review Question - QID 214914

An 87-year-old man develops sudden onset shortness of breath and dizziness while recovering in the hospital after a myocardial infarction. He says that he was lying in bed when he started feeling like his "heart was beating crazy." His past medical history is significant for hypertension, hyperlipidemia, and a recent coronary artery stenting. Physical exam reveals a pale, diaphoretic man with an irregular pulse. Ten minutes after hospital staff are called to the patient's room, pulses are lost, and the patient passes away despite advanced cardiac life support measures. Which of the following would most likely be seen during pathologic examination of this patient's previously infarcted cardiac muscle?