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supraventricular tachycardia characterised by a succession of rapid atrial depolarisation waves.

''ECG findings''
    'sawtooth' appearance
    as the underlying atrial rate is often around 300/min the ventricular or heart rate is dependent on the degree of AV block. For example if there is 2:1 block the ventricular rate will be 150/min
    flutter waves may be visible following carotid sinus massage or adenosine

''Management''
    is similar to that of atrial fibrillation although mediction may be less effective
    atrial flutter is more sensitive to cardioversion however so lower energy levels may be used
    radiofrequency ablation of the tricuspid valve isthmus is curative for most patients