Tachycardia: Difference between revisions

Atrial tachycardia (AT) is a tachycardia resulting from fast firing in an ectopic focus or micro re-entry circuit in the atria.<cite>8</cite> It has a rate of 100bpm. In some patients the tachycardia has multiple foci (multifocal atrial tachycardia). This results in different P-wave morphologies on the ECG during the arrhythmia. Atrial tachycardia can be caused by all the mechanisms of arrhythmia formation. Patients after earlier surgery or catheter ablation usually present with macro re-entry AT located around functional or anatomical sides of block. Atrial flutter is a distinct type of AT, but due to its unique mechanism it is discussed separately.