The following symptoms may occur within minutes to 1 hour before the collapse:  
Chest pain Dizziness Nausea Palpitation Shortness of breath
What are the historical and symptom characteristics of ventricular fibrillation?
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: What are the historical and symptom characteristics of ventricular fibrillation? [/INST] \n The following symptoms may occur within minutes to 1 hour before the collapse:  
Chest pain Dizziness Nausea Palpitation Shortness of breath</s>