A 22-year-old man with no previous cardiac history, but with a history of a seizure disorder for the past 4 years, presents to the emergency department after an unwitnessed syncopal episode. He is admitted to the hospital and placed on telemetry.
A few hours into his hospitalization, he experiences a recurrent syncopal episode, during which the following telemetry strip is recorded.
What is the arrhythmia?
