[Multifocal atrial tachycardia]

The multifocal auricular tachycardia is one ectopic rhythm anomaly, conditioned by a constellation of biochemical and mechanic factors. The presence of four basic ECG-criteria, characterizing the origination of heterotropic impulses from different auricular foci are necessary in order to admit that anomaly. The author has followed up seven cases, presenting characteristic ECG-records and clinical states, when multifocal auricular tachycardia arises. The considerable resistance of the applied antiarrhythmic therapy was stressed upon as well as the high mortality in case of that rhythm disorder, usually occurring in patients with advanced heart diseases.