Table 2. Changes in time-domain features across six consecutive PVT blocks (x̄ ± s).

Time-domain features	Block 1	Block 2	Block 3	Block 4	Block 5	Block 6
Mean RR	779.82 ± 105.37	775.4 ± 98.24	774.14 ± 94.6	779.91 ± 92.84	780.01 ± 91.09	784.21 ± 90.75
SDNN	44.3 ± 17.62	45.06 ± 18.31	46.42 ± 19.57	46.38 ± 15.26	49.11 ± 18.92	47.51 ± 16.87
Mean HR	78.28 ± 10.16	78.53 ± 9.31	78.59 ± 9.07	77.96 ± 8.82	77.95 ± 8.95	77.49 ± 8.67
SDHR	4.58 ± 2.45	4.73 ± 2.6	4.95 ± 2.86	4.76 ± 1.78	5.16 ± 2.58	4.8 ± 2.02
HR Max-min	27.21 ± 8.25	28.9 ± 9.65	29.02 ± 8.1	29.65 ± 8.1	31.88 ± 13.58	30.21 ± 7.37
RMSSD	40.26 ± 23.77	38.76 ± 27.19	39.63 ± 28.49	39.16 ± 19.71	41.79 ± 27.43	40.07 ± 23.13
NN50	96.19 ± 81.65	81.41 ± 65.68	81.31 ± 67.08	84.62 ± 66.54	83.82 ± 68.01	82.37 ± 61.77
pNN50	18.91 ± 16.54	15.67 ± 13.58	15.6 ± 13.8	16.3 ± 13.76	16.12 ± 14.05	16.2 ± 13.08
RR tri index	11.8 ± 3.86	11.56 ± 3.39	12.14 ± 3.82	12.12 ± 3.44	12.28 ± 3.59	11.96 ± 3.22
TINN	234.24 ± 102.34	244.75 ± 125.05	245.86 ± 123.6	250.46 ± 104.4	272.04 ± 148.74	254.37 ± 132.94