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Review Question - QID 214520

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QID 214520 (Type "214520" in App Search)
A 61-year-old man presents to the emergency department with a 30-minute history of crushing substernal chest pain. On presentation, he is found to be uncomfortable and diaphoretic with ST-segment elevations in leads V3-V5. He is given a sublingual medication that dramatically reduces the amount of pain that he is experiencing. Which of the following is the predominant mechanism by which this medication is effective for this patient?