John, an 82-year-old retired librarian is brought into the ED where you practice nursing. The client's heart rate is greater than 155 beats/minute. As you connect him to the ECG, you notice that his rhythm is regular, rate is 162 beats/minute, and diastole is shortened. He is intermittently alert and reports chest pain. P waves cannot be identified. What condition would you expect the physician to diagnose?
a) Atrial flutter
b) Sinus tachycardia
c) Heart block
d) Supraventricular tachycardia
Answer: d) Supraventricular tachycardia
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