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A comment on Bike crash left Spokane man unconscious, so his Apple Watch called 911. Parent comment

Re:Bike crash left Spokane man unconscious, so his Apple Wat... by clort on Wednesday September 25, 2019 @02:36AM (#21068288)
12 wires attached to his torso, recording all the electrical impulses from various points, tracing out a graph.

They call this an electrocardiogram (ECG) but the one I had for a medical didn't have 12 leads just 5 or 7 I think.

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Re:Bike crash left Spokane man unconscious, so his Apple Wat... by JshWright on Wednesday September 25, 2019 @08:33AM (#21070118)
A 12 lead is actually 10 wires (the "leads" are then comprised of various combinations of those wires).

https://en.wikipedia.org/wiki/Einthoven%27s_triangle

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