Multifocal Atrial Tachycardia (MAT) • LITFL • ECG Library …

Multifocal Atrial Tachycardia (MAT) Overview. A rapid, irregular atrial rhythm arising from multiple ectopic foci within the atria. Most commonly seen in patients with severe COPD or congestive heart failure.; It is typically a transitional rhythm between frequent premature atrial complexes (PACs) and atrial flutter / fibrillation.

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