How do I query for the discrete values used to calculate a heartRateVariabilitySDNN value?
I'm trying to get what the Health app refers to as the "Beat-to-Beat Measurements" that were used to calculate the HRV value.
Interestingly, these beat-to-beat values are NOT part of the usual heart rate data saved as Heart Rate BPM, and I don't see any metadata on the heartRateVariabilitySDNN objects.
Have you had any luck with this? I'm trying to do the same. It seems the HealthKit SDNN refered to in this documentation only refers to the SDNN value (in ms) rather than allowing access to the raw beat-to-beat HR values and most importantly the time stamp of each heart beat in the format H:m:ss.SSSS (in order to calulate the RR interval).
Cheers
Grant.
I'm having the same problem. Did either one of you figure it out already?
Unfortunately not :-(. Let us know if you find anything!
Ditto...
We've heard back from Apple Support on this and they've said there's no API for accessing the raw beat-to-beat heart rate values and timestamps. The only option is to request the feature via Bug Reporter, which I've done. I suggest we all do it!
Cheers
Grant.
Hi, you can try HKHeartbeatSeriesSample to get the heartbeat series sample. You can get the timestamp for each detected heartbeat.