i was using a Apple Watch Ultra 2 and upgraded to an Apple Watch 12 with IOS 27.0.1
i also wear a Whoop 5 MG and a Google Fitbit Air for comparriosn.
I have been building personal Apps to track and monitor my Apple Health Data.
I have moderate sleep apnea and also have a 6% PVC burden, which happens mostly overnight. I also suffer from paroxysmal AFib with RVR. However, i was wearing a holter monitor during the last two weeks and that confirmed no afib - so the high HVR is not Afib related its PVC.
My latest data overnight on Apple watch us showing very high HRV 200-400 since i moved to my apple watch 12 and ios 27.0.1.
i realise that this HVR is not showing correct values but its due to the algraithum Apple is using.
However, my My Google Fit Air and Whoop 5 MG show around 100 HRV so clearly they are doing something better / different.
I think the way the Apple Watch is calculating HRV has a bug.
