Review Question - QID 214365

A 61-year-old veteran is being treated in the hospital after a myocardial infarction when he develops sudden onset shortness of breath. His past medical history is significant for emphysema and congestive heart failure but he says that he had not been experiencing any symptoms earlier in the day. On physical exam, a new holosystolic murmur is heard at the cardiac apex that radiates to the left axilla. He is also found to have coarse crackles bilaterally in the lung bases. Which of the following would most likely be seen on light microscopy of this patient's heart at the time of this complication?