Re:Bike crash left Spokane man unconscious, so his Apple Wat...
by PeterStuer on Wednesday September 25, 2019 @02:37AM
(#21068300)
It is a reference to the number of electrodes attached to the monitor. A 12 lead setup can provide a much more detailed signal and thus be used in different diagnostics than a lower lead obtained trace.
https://www.ncbi.nlm.nih.gov/books/NBK538203/