This 49 year old man who underwent closure of an atrial septal defect (ASD) 9 years before admission complains of recurrent paroxysmal tachycardias resistant to antiarrhythmic drug therapy.
Tracings 1 and 2 were recorded during episodes of tachycardias.
Limb leads: From top to bottom 1, II, III aVF, aVL, aVF
What is your interpretation of the ECG tracings?
How would you manage this case?