I'm aware of those categories, I just wondered about the use of the term "chronic" as applied to A-fib. I don't think it's an official category for duration of A-fib, though I noted back when my cardiologist and company first found my short runs of A-fib on my quarterly remote pacemaker reports, they referred to it as "chronic" A-fib a couple times. I see now they refer to it as paroxysmal A-fib, as it occurs whenever it feels like it, but it stops spontaneously generally within a few seconds to occasionally an hour or two. It's pretty well controlled with metoprolol, at least at this point, and often it's asymptomatic.