Autonomic laterality in caloric vestibular stimulation

Table 1 The mean ± SD of average heart rate and blood pressure (n = 12)

The condition of recording	Average heart rate	Systolic pressure	Diastolic pressure
Before vestibular stimulation	72.33 ± 9.47	123.07 ± 15.41	70.07 ± 6.74
Left vestibular stimulation at +30º	73.41 ± 8.95	127.29 ± 11.68	72.86 ± 5.55
Left vestibular stimulation at -60º	72.16 ± 8.69	127.21 ± 12.03	71.36 ± 7.93
Right vestibular stimulation at +30º	73.13 ± 8.24	128.07 ± 15.42	74.07 ± 6.74
Right vestibular stimulation at -60º	72.13 ± 9.56	126.36 ± 11.15	70.36 ± 7.15
Last recovery stage	70.85 ± 9.10	122.29 ± 11.34	70.64 ± 7.17

Table 2 The mean ± SD of the time and the frequency domain indices of heart rate variability (n = 12)

	Before vestibular stimulation	Left vestibular stimulation		Right vestibular stimulation		Last recovery stage
		at +30˚	at -60˚	at +30˚	at -60˚
Total power (ms²)	2009.5 ± 147.9	2905.6 ± 2506.5	8698.7 ± 2185.8	2277.4 ± 1556.3	5063.2 ± 4842.9	3173.9 ± 2562.7
HF ms²	628.25 ± 592.3	871.51 ± 819.6	2472.36 ± 629.6	527.50 ± 415.7	1493.71 ± 1900.2	848.51 ± 862.5
nHF (nu)	47.63 ± 19.35	42.76 ± 12.34	40.25 ± 12.96	40.59 ± 14.81	40.56 ± 10.08	40.15 ± 13.76
LF ms²	434.94 ± 320.27	697.00 ± 554.68	2048.37 ± 479.73	581.52 ± 551.35	1015.51 ± 905.88	753.21 ± 457.60
nLF (nu)	44.85 ± 18.78	45.31 ± 17.48	46.85 ± 17.52	50.57 ± 17.97	43.09 ± 17.83	49.76 ± 18.71
LF/HF	1.33 ± 1.07	1.34 ± 1.21	1.32 ± 0.7	1.57 ± 1.05	1.18 ± 0.71	1.61 ± 1.38
SDNN (ms)	44.85 ± 17.85	56.55 ± 26.06	70.95 ± 63.38	50.12 ± 16.48	61.24 ± 25.08	55.63 ± 18.84
SD delta NN (ms)	36.00 ± 20.42	48.76 ± 34.26	67.81 ± 81.36	40.04 ± 17.64	58.44 ± 40.01	49.45 ± 29.70
SDNN/SD delta NN	1.429 ± 0.468	1.421 ± 0.561	1.359 ± 0.525	1.385 ± 0.388	1.318 ± 0.548	1.321 ± 0.441
RMSSD	35.95 ± 20.39	48.70 ± 34.22	67.69 ± 81.18	39.98 ± 17.61	58.36 ± 39.96	49.37 ± 29.63
Maximum NN (ms)	988.5 ± 158.4	1085.5 ± 273.35	1197.6 ± 352.8	1033.6 ± 193.9	1267.6 ± 384.1	1122.2 ± 232.8
Minimum NN (ms)	704.30 ± 82.52	687.78 ± 72.81	685.34 ± 104.34	685.00 ± 59.56	690.15 ± 119.1	695.47 ± 85.85
Range NN (ms)	284.2 ± 113.7	397.8 ± 279.8	511.7 ± 380.1	348.6 ± 159.1	577.4 ± 404.4	426.7 ± 248.7
Mean NN (ms)	843.2 ± 113.6	829.2 ± 106.0	844.0 ± 113.9	829.9 ± 90.9	846.2 ± 119.0	860.2 ± 114.0
Normals (%)	99.13 ± 1.34	99.41 ± 1.07	98.93 ± 1.56	99.43 ± 0.96	98.54 ± 2.29	98.10 ± 3.86
Ectopics (%)	0.87 ± 1.34	0.56 ± 0.99	1.07 ± 1.56	0.57 ± 0.96	1.43 ± 2.27	1.88 ± 3.86

VLF: Very-low-frequency; LF: Low-frequency; HF: High-frequency; nLF: Normalized value of LF; nHF: Normalized value of HF; NN: Beat-to-beat intervals of normal sinus rhythm; SDNN: Standard deviation of NN intervals; SD delta NN: Standard deviation of the differences between adjacent NN intervals; RMSSD: Square root of the mean of the squares of the successive differences between adjacent NNs.