ECG readings

I don't need to be a medical professional to know that an ECG sensor would be pointless on this watch. Maybe an *accurate* ECG sensor (which as explained above, isn't really possible on a watch) would be useful for my grandmother, but she's not really in the market for a Fenix.

You are absolutely right:
But: There is no need for worldwide expensive certifications. If you look at the FDA certificate level, it must be the easiest and cheapest to get :-D

I can't see a market in a Fenix or Forerunner for a model with ECG. I have had to much false alarms on the ambulance with Apple Watch users to even think there is a proper use can in a mass market Modell.

Do what I do , wear fenix 6s pro on one wrist , apple watch on other LOL :-)

Do not give your “opinion”. Use facts and teach understanding. Otherwise it comes out as an angry and ignorant response. Whether or not something works depends one each and every one of our bodies. The wearable devices use studies and and ton of measured data. They are pretty good but to understand accuracy you need to understand how it works.

Garmin is getting better at giving explanations and references to their external sources but still has ways to go. Better than other manufactures though. 

I am a sceptic by nature but worked in the industry for a while. The good developers spend a lot of capital on testing and finding better sensors and keep learning about how the body works. The bad one built devices based on sensors and do minimal studies on how to implement the algorithms i.e. software to give you proper information. 

 Everyday we are getting better at it but not perfect. AI is helping and it is getting pretty interesting. At the end you have to learn too to understand what makes it work for you. 

I have a Fenix 6 and I love reading the day. Is it accurate? Well hard to say so I do my own study. The numbers are reference points and as I change my eating habits, exercise more or sleep less the data will change. As it does it teaches me how it correlates to my actions. 

Medical ECG are today using 12 separate measurement locations for proper result. Your wrist is one of those. This means that if you have a comparison between your one location to the 12 individual locations you can determine if that one location is enough to represent your other 11. Everyones body willl have different responses so it will depend on your body’s response. Again your 1 to 11, 

I recommend looking up “what are the 12 point leads for ECG”. There is a lot of visual material out there to inform you.

So measuring ECG (EKG) on your wrist is not wrong but has a degree of error depending on your body’s response. Having a basic 12 point reference is very helpful. Remember to read you watch EKG in the same time space when you have your 12 point measured. Get the average and the individual points. This will give you good understanding of your watches accuracy.

Science is constantly changing and we find new ways to get information. So is one wrist measurement good enough to perform an ECG measurement? I will eave that for you to answer for your self.