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Figure 2 Mean ERP after constant pacing (300, 400, 500, 600 and 700 ms) and after longshort (600 to 300 ms) and shortlong (300 to 600 ms) sequences in patients in washouts. Mean ERP during the longshort sequence is significantly shorter than ERP at 300 ms. This "overshoot" is not bidirectional, because no difference is present between ERP during the shortlong sequence and ERP at 600 ms.
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