Multifocal Atrial Tachycardia | Tachyarrhythmias - MedSchool
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Multifocal Atrial Tachycardia



  • Multifocal atrial tachycardia is an irregular rhythm that occurs due to multiple atrial ectopic foci.
    • Look For

    • Heart rate >100bpm
    • At least three different P wave morphologies
    • Variable PP intervals
    • An isoelectric baseline (to differentiate from atrial fibrillation or flutter)
    • Causes of Multifocal Atrial Tachycardia

    • COPD exacerbation
    • Cor pulmonale
    • Ischaemic heart disease
    • Rheumatic heart disease
    • Hypokalaemia / hypomagnesaemia
    • Digoxin toxicity
Last updated on December 29th, 2018