Collapse and loss of consciousness are the most common symptoms of ventricular fibrillation. Before a ventricular fibrillation episode, you may have symptoms of an irregularly fast or erratic heartbeat (arrhythmia). You may have:  Chest pain Very fast heartbeat (tachycardia) Dizziness Nausea Shortness of breath 
collapse loss consciousness common symptoms ventricular fibrillation  ventricular fibrillation episode  may symptoms irregularly fast erratic heartbeat (arrhythmia)  may have:  chest pain fast heartbeat (tachycardia) dizziness nausea shortness breath 
ventricular fibrillation