A 35-year-old woman presents to the Emergency Department with palpitations. She reports that since she was a teenager, she has had 1-2 episodes per year of rapid palpitations, that start and end abruptly and are associated with weakness, mild dyspnea, and a pulsating sensation in her neck. She reports that her current episode started roughly half an hour ago:

• AV Nodal Re-entrant Tachycardia