Sleep architecture and heart rhythm

[ruthkam]

Hi 

I recently encountered an interesting observation. I treat people with AF and one of my patients had an ablation procedure which converted him to sinus rhythm. He wears a fitbit all the time and he noticed that before the ablation when he was in AF the fitbit was not displaying his sleep stages at all and now suddenly it is able to chart all his sleep stages. What information does the fitbit use to determine sleep stages?

[WavyDavey]

Hi @ruthkam,

Fitbit uses heart rate and heart rate variability in determining sleep stages. If there's no a consistent signal, it may fall back to the simplified sleep. Hope that helps.