A 14-year-old girl complained of palpitations that occurred numerous times a week with no special triggers. Physical examination revealed no abnormalities with an exception of a fast regular pulse (185 beats/min). A deep breath hold did not stop the tachycardia this time and adenosine was administered intravenously. The ECG (leads I, II, V1 to V6) shortly after the bolus adenosine is shown in the ECG.
What could be the diagnosis based on her ECG findings? *This case is from Docplexus Editorial Team for Educational Purpose only.
