Comparison of Multifocal Atrial Tachycardia, Atrial Fibrillation and Atrial Flutter

Multifocal Atrial Tachycardia - Atrial Rate > 100

1. >3 p wave morphologies

2. Isoelectric baseline

3. Irregularly irregular

4. Irregular P-P intervals

Atrial Flutter - Atrial Rate 300: 

1. "Saw tooth" flutter waves

2. Regular PP intervals

3. Regular or irregular depending on block

Atrial Fibrillation - Atrial Rate > 350: 

1. Wandering baseline

2. Irregularly irregular RR

3. No discernible P waves



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