Paroxysmal Atrial Fib vs atrial tacchycardia

What is the difference? It seems my doctor had difficulty deciding on ekgs which it was.




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[ireneo]

The book I have on arrhythmias and EKG's states Atrial tachy runs 100-250 bpm, atrial flutter runs 250-400 bpm and atrial fibrillation runs over 400 bpm. There's more to it than that though. A-flutter tends to create a sawtooth pattern with the P waves and the rhythm is regular. A-fib sawtooth waves look very irregular and the bpm keep shifting depending on the ratio - how many signals are getting through to the ventricles.