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. Author manuscript; available in PMC: 2016 Dec 1.
Published in final edited form as: Heart Rhythm. 2015 Aug 10;12(12):2402–2410. doi: 10.1016/j.hrthm.2015.08.009

Figure 1.

Figure 1

Schematic presentation of the method. A. 12-lead ECG. B. Digtized transformed XYZ ECG. C. Averaged area under QRST curve on X, Y, and Z leads is summed to obtain SAI.