How does Apple Watch do ECG?

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Tags

1. #electrocardiogram
2. #rapid
3. #built
4. #electrodes
5. #heartbeats
6. #detect
7. #skipped
8. #rhythm
9. #crystal
10. #digital
11. #heart
12. #intended
13. #wrist
14. #capture
15. #problems
16. #doing
17. #apple
18. #watch
19. #series
20. #right
21. #crown