A 28-year-old woman presents to your clinic with palpitation…
A 28-year-old woman presents to your clinic with palpitations and mild shortness of breath after running a half-marathon earlier in the day. She has no past medical history and takes no medications. Vital signs: HR 112 bpm, BP 118/72 mmHg, RR 18, O₂ 98% on room air. Physical exam is unremarkable. EKG: sinus tachycardia at 110–115 bpm with normal P waves and QRS complexes. Which of the following is the most appropriate next step in management?