I've had two episodes of ventricular tachycardia.  I wasn't drinking during either incident, but do drink on weekends occasionally.  I had the catheter ablation surgery and a week later, had my second episode. Coincidently, I started prozac ten days before the first attack where I had to be converted with the cardia pads.  I"m only 39, I do not smoke and was running 15 to 20 miles a week. I don't get what could be causing it.

Summarized question: What causes Ventricular tachycardia?