Which are the symptoms?
The circuit results in an atrial contraction rate of 300 BPM. Fortunately, the atrioventricular node does not conduct all these impulses to the ventricles, but only 1 in 2, 1 in 3 or more, preventing the heart from beating at a life-threatening rate.
A 1:1 conduction is rare, in which case atrial flutter poses an immediate danger to the patient.
Such tachycardia may be paroxysmal (episodes of varying duration intermittent with periods of normal rhythm) or continuous.
How is it diagnosed?
How is it treated?
Transcatheter ablation using fluoroscopic or (in unrepresentative cases) non-fluoroscopic techniques is the treatment of choice.