Overview
- Tachyarrhythmia at the rapid end of flutter/fibrillation spectrum
- Produced by macro-reentry within multiple circuits in atria; characterized by irregular multiform f waves
ECG Features
- Indiscernible, absent P waves with an irregularly irregular ventricular rate
- Atrial activity is represented by fibrillatory (“f”) waves with no organized pattern
- Classification based on ventricular rate: <60 beats/min = slow ventricular rate (SVR), 60-100 beats/min = controlled ventricular rate (CVR), >100 beats/min = rapid ventricular rate (RVR)