New Apple Watch can do an ECG in 30 Seconds

Watched the detailed Apple presentation of this yesterday.  Amazing the whole thing can now be put into  a Watch and they claim the (one lead) ECG can be requested and be received in thirty seconds.    An AI analysis is said to do the analysis.  Can be recorded and sent to you doctor on a PDF file.    Some elements of 'diagnosis' are involved.   The watch is expense at $400 plus. See in Wired 'Apple Watch Could do more Harm than Good'   https://www.wired.com/story/ecg-apple-watch/     Some physicians at the presentation had similar objections.    ...