Final answer:
The appropriate medication for the patient would be adenosine, commonly used for the treatment of supraventricular tachycardia (SVT).
Step-by-step explanation:
In this case, the appropriate medication for the patient would be adenosine. Adenosine is commonly used for the treatment of supraventricular tachycardia (SVT), which is a possible cause of the patient's high heart rate. It works by slowing down the electrical conduction in the heart, eventually restoring normal rhythm.