Good catch. I, too, suspect dehydration is a contributing factor to my episodes of a-fib. I generally have no sensation of thirst until bedtime, so I forget to drink. Now I'm trying to pay more attention to my fluid intake through the day. As a nurse, I'll point out what may not be obvious to everyone: fluid intake is comprised of all liquids, not just water. When your fluid intake is being recorded in the hospital, the total will consist of "clear" liquids that are mostly water (coffee, tea, juice, soda, jello, broth etc.) and "full" liquids with high water content (milk, pudding, creamed soups, ice cream etc.). So if you aren't a big water fan, you can meet your body's needs for water in other ways.