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Can anyone give me details on what “other” rythm is during continuous ecg? i get about 17-20 percent “other” throughout the night.
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![Profile picture of Big Eric]()
This is exacyly why I think we need to see the %other both the way it is currently calculated and also the raw calculation that tells us what % of heartbeats is ‘ectopic’. For example, if you slept for 10 hours – that’s 1,800 , 20 second segments. So the device saying that your ‘other %’ is 20% could mean that 20% of these segments have just a single ectopic beat in them, i.e. 360 ectopic beats during your sleep , or (if your heart rate was 60 on average) then the other, albeit unlikely , extreme could be that 20% of your 20 second recordings were all ectopic beats – i.e. 7,200 ectopic beats during your sleep. So the possible range of number of ectopic beats during your sleep , that would give the same “%other” as calculated by the device / app is between 360 and 7,200 – effectively useless in seeing any trends.
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![Profile picture of Community Manager]()
Thanks for pointing this out. We are trying to improve our visualisation of ectopics, particularly for our users on the recently launched, FDA Cleared FX+ device. Your suggestion is very helpful.
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![Profile picture of geoff]()
I asked the same question during a Q&A with support when I first got mine, and was told that any HR reading below 50bpm overnight would register as “Other”. That’s the threshold.
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The algorithms on the FX2 classify rhythms in the categories of “Normal”, “Other”, and “Noisy”. Any rhythms that display clean ECG signals and are identified to be other than “Normal Sinus Rhythm” are classified “Other”. As suggested by Geoff, when the HR drops to 50 bpm, this is typically considered as Bradycardia by clinicians and therefore we classify this rhythm as “Other”.
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I think that “other rhythm” is a tricky measure. The algorithm analyses your ECG and tries to determine if something is outside the periodical rhythm of your heart. The analysis is done after the recording. Doing a bit of reverse engineering, the formula for calculation is %NOR = #NOR * 100 / (3*TT), where #NOR is the total number of “other” and TT is the total time of the recording in minutes. So, if you have one single “other” in the 20s recording, the percentage takes all 20s as “other” in the calculation of the %. About the interpretation, it’s difficult. The deviation from the standard can be related to multiple factors, in some cases not directly correlated with the heart function, like movements, fasciculations, interferences and so. But it can also reveals PVC or other heart anomalies. In essence, 17-20% when you sleep seems a bit high, but you should analyse how clean is the wave recorded before draw conclusions, and also after, it is difficult to conclude something. If you are concern, the best way to clean up the doubts is a 24/48h Holter. However, if you did ECG recently and all were good, it should not be a problem. Cheers.