When HN users recommended it
1 HN user recommended this in 2025, in one comment.
20072026
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
1 HN user recommended this in 2025, in one comment.
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
I do not know the answer to your specific question but I do know there are consumer 6 lead ECG's that one can purchase [1] for much less than the amounts you are talking about. Some of them are stand-alone [2] and some require a cell phone.
For 10 minutes in April I was seeing double.
There are many things that can cause this unrelated to the heart and should be looked into by a doctor. I am not a doctor and this is not medical advice. Even staring at a screen too long can cause temporary diplopia and there are nutrient/mineral deficiencies that can exacerbate this unless you mean you were going cross-eyed and there are multiple things that can cause that. Don't panic, talk to professionals. I personally would start with an ophthalmologist and nervous system specialist (that is one person).
just an example, there are many of these, not medical grade but don't need to be for your doctor to see if something is off.
[1] - https://www.amazon.com/KardiaMobile-Personal-Device-Heart-Mo...
[2] - https://www.amazon.com/EMAY-Portable-Channels-Compatible-Sma...