Two patients aged <35 years are seen in the emergency department with complaints of arrhythmia. A young man experiences palpitations and syncope during dinner; a young woman with congenital heart disease feels palpitations after consuming 2 energy drinks and is presumed to be in SVT. Vital signs and physical examinations in both cases are otherwise normal. ECG interpretation will clarify the differential diagnoses, right? What's your ECG read?