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Figure 3 QRST subtraction. On digitized signals, QRST subtraction was performed as described in the Methods section. The green line represents an averaged QRST complex, and the blue line illustrates the averaged QRST effect (A). Incoming electrocardiogram signal is depicted in panel B. (C) Superimposed incoming electrocardiogram signal (green line) and the electrocardiogram signal after subtraction (red line) are shown. (D) The electrocardiogram signal after QRST subtraction is shown.
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