Cardiac Arrhythmia?

I really can't believe that I got such referral in clinic today.This is a young teenager who was seen in district clinic and somehow had an ECG done. The clinic MO described it as "P waves present, but R-R interval irregular" and referred for "cardiac arrhythmia".I'm sure you get the diagnosis by one look at the ECG. And I believe it's fair to say that this can be interpretated by an