Figure 1.
Calculation of the S‐R difference in V1‐V2. S‐R difference in V1‐V2 was calculated with this formula on the 12‐lead surface ECG: V1‐2 SRd (mV): [V1S amplitude (b) + V2S amplitude (d)] – [V1R amplitude (a) + V2R amplitude (c)]
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