Narrow Complex Tachycardias (Simplified) Irregular Narrow Complex Tachycardia: 1. Atrial fibrillation - Usually the correct answer 2. Multifocal Atrial Tachycardia (MAT) ≥ 3 different P wave morphologies 3. A regular rhythm with variable conduction Regular Narrow Complex Tachycardia: 1. Sinus tachycardia 2. Atrial flutter 3. (Ectopic) Atrial tachycardia - Ectopic P 4. "PSVT" (atrioventricular) - No obvious P (or retrograde) - AVNRT, AVRT, Junctional tachycardia #NarrowComplex #Narrow #Tachycardias #differential #diagnosis #causes #cardiology
