Daily Caffeine Intake

A recent sleep study revealed that I have a cardiac arrhythmia. I am fairly certain the first thing the PCP is going to tell me is that I need to cut caffeine. I currently drink about five (8) Ounce Cups of Coffee per day, and have since my deployment to the Middle East in 09/2001. It literally takes that much coffee just to get me moving in the morning. Now that I look at it, that's like 650mg of Caffeine (130mg per cup of the coffee that I drink).

When I look at what is considered normal and healthy (no more than 400mg per day)....I am significantly beyond that, and paralyzed without it.

What's your stats? How much caffeine do you require?