ECG readings

Is the hardware already built in to the watch? if not then no.  The watch would need the correct connections to the case in order to measure the electrical current so if that is not present it will never happen.

No. It doesn't have the sensor for it.

Thanks for the answer. I am asking because I don't know if this can happen I mean the sensor.

No. You dont have the hardware for this. The Sensor ist not enough because you have to get you heart, and not your wrist bumps. 

I would love to have garmin come out with a little external sensor in the shape of say...a finger ring that would give us these measurements broadcasted to the watch. 

It's nice to dream. 

It requires electrodes on the watch, which the Fenix does not have. If you're not familiar with how the watches with ECG work, they have a sensor on the front that you touch your finger to, and it takes an ECG reading. It does not / cannot take passive readings throughout the day, you have to go into the ECG app and touch your finger to the watch and wait.

Literally not useful for anybody except those at risk of serious heart problems, who are incidentally not usually athletes, which is who the Fenix is designed for. It would be about as useful for us as adding Life Alert functionality to our watches.

For an Apple or Samsung watch, it makes more sense, as plenty (most?) of their users are average inactive people, and a lot of them are elderly.

Fenix doesn't need to have everything that every other watch has.

total gimmick for most of us normies 

C.sco Federonic I take it you are both medical professionals?

Why should that matter? Have we now got to be ‘medical professionals’ to post an opinion about the utility of ECG on a watch? Accuracy of a single-lead ECG was found to have only 50% agreement with clinical 12-lead ECG - little more than a guess really - https://pubmed.ncbi.nlm.nih.gov/25968916/

A more recent study in 2019 also found that single-lead ECG is inaccurate for measuring QTc intervals (which would be the intent as other intervals cannot be assessed with a single-lead) https://onlinelibrary.wiley.com/doi/full/10.1111/anec.12683

But these are independent studies.

Studies reported by the manufacturers of single-lead ECGs naturally present a much rosier picture of course. For example - https://www.alivecor.com/press/press_release/new-medical-grade-single-lead/. However, such studies are little more than pseudo scientific advertising.

Just because other watches have an essentially useless metric doesn’t mean that GARMIN should feel obliged to add it.

I am, and it’s a gimmick for garmin’s customer base and opens you up to now being a medical device and all the costs that worldwide certification brings. As a medical professional, I require a minimum of a 12 lead ECG.... not a single view of the heart.