• support@fourthfrontier.com
  • Not able to start the activity, can anyone share customer care number or mail id , phone and sensor not connecting

  • Clothing differences:
    Hi all, I’ve found that when I wear a dry-fit style top (the material that moist running singlets and t shirts are made of) next to my skin and frontier X I get much higher heart rate notifications that don’t relate to the effort I’m putting in and how I feel.
    This morning my reading was 165 (I wasn’t working that hard)…Read More

  • 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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    • 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…Read More

      • 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…Read More

        • 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.

    • 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.

      • 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 ther…Read More

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  • Brand new here. Can one set up the EKG to alert real time for Atrial Tachycardia or Atrial Flutter? Also, I see the 20 second EKG strip but from what part of the workout is that taken from and where is the rest?

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    • The 20 second EKG strip is the one corresponding to where the cursor is on the colour banded ‘heart rate’ section. I cycle through the entire recording by using the right cursor arrow on my keyboard to advance it one 20 second section at a time

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