Multifocal atrial tachycardia (MAT) is a specific presentation of atrial tachycardia characterised by chaotic atrial activation arising from multiple foci. Its recognition and management follow a distinct clinical pathway.
Multifocal atrial tachycardia is defined as a rapid, irregular rhythm with at least three distinct morphologies of P waves on the surface ECG. This pattern reflects multiple competing atrial foci driving the arrhythmia.
Management begins by addressing the underlying condition driving the arrhythmia. An additional intervention may be considered even when routine laboratory values appear within normal range.
Multifocal AT is defined as a rapid, irregular rhythm with at least three distinct morphologies of P waves on the surface ECG.
The first-line treatment is management of the underlying condition.
Magnesium (i.v.) may also be helpful in patients, even in those with normal magnesium levels.
Treatment of an underlying condition is recommended as a first step, if feasible.
DOI: 10.1093/eurheartj/ehz827
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