A myocardial infarction is ________
A) a small area of dead tissue
B) an overactive heart muscle
C) blocked oxygen flow
D) diseased heart muscle
A
Explanation: A) Correct! Infarct/o- means "small area of dead tissue."
B) It is not an overactive heart muscle.
C) This describes ischemia, not a myocardial infarction.
D) It is not a diseased heart muscle.
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