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Multifocal Atrial Tachycardia

February 15th, 2021


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
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