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Figure 3 The RPA decays rapidly after heart rate acceleration, in this case from CL 600 to 500 ms CL (120 beats/min), with TWAR for overlapping analyses commencing with beats 0, 5, 10 and 15 (epoch 1; immediate) being significantly larger than that for epoch 2 (early; p < 0.02) or epoch 3 (middle; p < 0.01). Solid bars = inducible patients; hatched bars = noninducible patients.