Table 1. HRV changes when editing RR intervals from a set of 51 orthostatic tests. Percentages compared to the original artifact-free recordings. Values are mean ± SD [min max]. RMSSD, % SDNN, % LF, % HF, % Tot, % supine rand10 0 ± 0 [-1 1] 0 ± 0 [0 1] -1 ± 0 [-2 1] 0 ± 1 [-3 4] 0 ± 0 [-1 1] rand30 0 ± 0 [-1 2] 0 ± 0 [-1 1] 0 ± 1 [-3 4] 1 ± 1 [-4 7] 0 ± 1 [-3 3] rand50 0 ± 0 [-1 2] -1 ± 0 [-2 0] -1 ± 1 [-6 4] 2 ± 1 [-2 6] -1 ± 1 [-5 2] rand100 1 ± 0 [-1 3] 0 ± 0 [-1 2] 6 ± 12 [-3 337]* -1 ± 2 [-8 14] 5 ± 18 [-4 668]* artifact 413 ± 2 [403 422]* 54 ± 0 [54 54]* 0 ± 1 [-1 7] -1 ± 1 [-3 3] +1 ± 1 [0 4] standing rand10 0 ± 0 [-1 1] 0 ± 0 [0 1] 1 ± 0 [-1 2] -1 ± 1 [-4 3] 0 ± 0 [-1 2] rand30 0 ± 0 [-2 1] 0 ± 0 [-1 1] -1 ± 1 [-4 3] -1 ± 1 [-6 3] -1 ± 1 [-3 2] rand50 0 ± 0 [-1 2] 0 ± 1 [-1 1] 2 ± 1 [-3 4] 2 ± 1 [-3 6] 1 ± 1 [-2 5] rand100 0 ± 0 [-1 2] 0 ± 0 [-1 1] 4 ± 13 [-5 441]* 2 ± 2 [-4 28] 5 ± 21 [-4 562]* artifact 269 ± 1 [264 272]* 47 ± 0 [47 47]* 1 ± 1 [0 8] -1 ± 0 [-2 2] 0 ± 1 [0 9] rand10 rand30 rand50 and rand100: randomly adding or subtracting 10, 30, 50 and 100ms to each RR interval; artifact: systematically adding a short-long sequence in each position possible in the RR times series. * p < 0.05 compared to the raw artifact-free trace.