Yes, the palpitations can happen any time. For me it’s usually at night and wakes me up. I’ve learnt that when I’ve had a high amount of sodium, or caffeine is when I have an episode. These days I avoid those things as much as possible. I’ve also had a couple of short episodes at night that did not wake me, but my Fitbit watch recorded them. I find the Fitbit is a good asset as it records the duration and the heart rate during an episode. My heart rate has been as high as 170 or 180 at times. I don’t worry about it any more. I take a beta blocker and a blood thinner, as prescribed..