| Rate | rapid, disorganized ventricular activity |
| P wave | obscured by disorganized ventricular activity |
| QRS | variable |
| Conduction | chaotic electrical activity |
| Rhythm | chaotic electrical activity |
This dysrhythmia results in the absence of cardiac output.
Almost always occurs with serious heart disease, especially acute MI.
The course of treatment for ventricular fibrillation includes: