The above ECG is that from a 12 year old girl who has had palpitations since the age of 4 and has felt them increase in frequency in the last two months and occur during exercise. She is otherwise fit and well with no other medical history or family history of note.
Treatment options include regular anti-arrhythmic medication (such as a beta-blocker) or doing an EP study with a view to catheter ablation of the accessory pathway.