A 50-year-old female presents to your ER with a chief complaint of palpitations. A 12-lead ECG shows supraventricular tachycardia at a rate of 165 bpm, and she is put on telemetry. She is clinically stable. You attempt the modified Valsalva maneuver with no effect. You explain that you will have to give her medication to bring her heart rhythm back to normal. She asks if you will give her “that adenosine drug” and …