A 27-year-old female pres...

A 27-year-old female with a history of anxiety presented with irregular palpitations. The patient had recently improved an upper respiratory infection. On presentation to the ED, the patient had a heart rate (HR) of 80 beats/min and BP of 155/78 mm Hg. No history of sudden cardiac death in the family. Telemetry was noted to have short runs of non-sustained wide complex tachycardia. An electrocardiogram (ECG) was obtained as below.