ECG readings different from Heart Rate readings

[LGB60]

Just starting having a big problem with my Sense that I've had for three weeks.  I was diagnosed with Afib and that's why I purchased the Sense, for the ECG capabilities.  The ECG feature worked fine up until a few days ago (correctly showed inconclusive when my heart rate was over 120). 

However, for the past two days I've ONLY gotten "Inconclusive" ECG results.  The problem is the difference in the ECG heart rate and the heart rate in the HEART RATE (red heart on home page) feature.  I just did three test ECGs:  (1) ECG shows 129; HEART RATE shows 79; (2) ECG shows 124; HEART RATE shows 83; (3) ECG shows 126; HEART RATE shows 81. 

I've just rebooted the device and it made no difference.  Can someone assist?

[LGB60]

Just starting having a big problem with my Sense that I've had for three weeks.  I was diagnosed with Afib and that's why I purchased the Sense, for the ECG capabilities.  The ECG feature worked fine up until a few days ago (correctly showed inconclusive when my heart rate was over 120). 

However, for the past two days I've ONLY gotten "Inconclusive" ECG results.  The problem is the difference in the ECG heart rate and the heart rate in the HEART RATE (red heart on home page) feature.  I just did three test ECGs:  (1) ECG shows 129; HEART RATE shows 79; (2) ECG shows 124; HEART RATE shows 83; (3) ECG shows 126; HEART RATE shows 81. 

I've just rebooted the device and it made no difference.  Can someone assist?

[Guy_]

Hi @LGB60  this post is about "hear rate variability" not being detected and nothing to do with heart rate. You probably chose the wrong entry.

[USAF-Larry]

@LGB60, it does seem odd that there would be that much difference in the readings, but remember the HR reading on the ECG chart is an average of the 30 second reading, while the HR reading on your app or Sense in an instantaneous reading.  They will never agree.

[JohnnyRow]

No medical expert or especially knowleadgeable about AFib here so don't put too much faith in this, but to consider:

Could it be the ECG is showing electrical signals while "heart rate" is really pulse, i.e. ventricular contractions that pump blood?  In Afib perhaps you are getting ECG electrical signals that don't get actually result in ventricle contractions pumping blood.

[Marrrmaduke]

@LGB60 This is because ECG app uses electrical sensors that are in the main frame and on the back. It's pretty much like a single-lead ECG. The heart rate tile in your app pulls data from the optical sensor (LEDs) on your Sense. Not only it's way less sensitive than 1-lead ECG but also quite often there is a delay what gets transmitted via bluetooth to your fitbit app. In reality, you should always look at the ECG recording as this is what will determine if you're having Afib not your HR. If you think your Sense is misbehaving, you can try rebooting it several times or even restoring to factory defaults. If you don't feel uncomfortable, perhaps you could post a screen shot of the ECG report/recording. Just the rhythm, without personal data (age, name etc). 

ETA: I have merged your previous post with this thread.