This would be possible I with the Polar H10 I think. The H10 sends raw ECG and analysis on this waveform could be used to find anomalies like afib. I haven't done this myself though.

What do you expect your doc to do with the data? Are you trying to capture very infrequent events or trying to quantify your afib burden?

Just show him what I'm experiencing. Sometimes it's hard to describe in words; try saying this to your cardiologist: "my heart goes thump-thump and then pauses for a second and then goes thump-thump-thump in rapid succession"

Get a Kardia 6 leed ecg device (around 150 USD). They even have one that fits in your wallet.

Heart rate is not enough. You need to look at the QRS and P wave via ECG.

I thought an apple watch identify afib history too.

You have to know if you have afib though, which can be tough to detect for people with infrequent and self limiting cases.

Example; I get bigeminy PACs, which apple watch flags as possible afib when there is noise that obscures the p-wave. But my cardiologist has seen the pattern on a more sensitive device and says it’s not afib.

Also one can have arrhythmia that is not afib