A 68-year-old man has become increasingly lethargic and weak for the past 7 months. On physical examination, his temperature is 36.9 C, pulse is 70/min, respirations are 15/min, and blood pressure is 160/105 mm Hg. On ausculta- tion of his chest, a friction rub is audible. There are no other remarkable findings. The representative gross appearance of the heart is shown in the figure. Which of the following labo- ratory findings is most likely to be reported for this patient?
A.
Elevated serum anti-streptolysin O titer
B.
Elevated plasma renin level
C.
Increased blood urea nitrogen level
D.
Increased serum CK-MB level
E.
Positive ANA with"rim"pattern
F.
Positive viral serology