The Analysis of How Apnea Influences the Autonomic Nervous System Using Short-Term Heart Rate Variability Indices

Table 2

Result of HRV during the normal respiratory condition and voluntary apnea.

	Mean-RR (ms)	rMSSD (ms)	nLF (%)	nHF (%)	LF/HF	α1
Normal
Respiratory state	831.59 ± 19.34	41.57 ± 4.62	44.16 ± 2.71	55.84 ± 2.71	1.07 ± 0.15	0.94 ± 0.04
1^st voluntary apnea	867.71 ± 22.07	21.16 ± 2.1	52.05 ± 3.29	47.95 ± 3.29	1.79 ± 0.27	1.18 ± 0.09
2^nd voluntary apnea	873.36 ± 21.95	20.62 ± 1.83	52.43 ± 2.79	47.57 ± 2.79	1.53 ± 0.21	1.18 ± 0.07
3^rd voluntary apnea	874.32 ± 20.98	20.02 ± 1.49	51.96 ± 3.14	48.04 ± 3.14	1.66 ± 0.24	1.05 ± 0.08
4^th voluntary apnea	873.23 ± 22.35	21.21 ± 1.64	48.23 ± 3.01	51.77 ± 3.01	1.4 ± 0.23	1.13 ± 0.07
5^th voluntary apnea	874.89 ± 21.84	21.45 ± 1.72	52.98 ± 3.51	47.02 ± 3.51	2.1 ± 0.36	1.17 ± 0.07
6^th voluntary apnea	874.53 ± 22.33	19.73 ± 1.61	50.73 ± 3.05	49.27 ± 3.05	1.58 ± 0.22	1.21 ± 0.08
7^th voluntary apnea	867.8 ± 20.97	21.86 ± 1.98	52.76 ± 3.54	47.24 ± 3.54	2.24 ± 0.43	1.18 ± 0.08
8^th voluntary apnea	870.88 ± 20.6	21.17 ± 2.25	49.17 ± 3.16	50.83 ± 3.16	1.5 ± 0.2	1.15 ± 0.09
9^th voluntary apnea	871.18 ± 20.56	20.52 ± 1.68	55.91 ± 3.14	44.09 ± 3.14	1.91 ± 0.25	1.35 ± 0.08
10^th voluntary apnea	880.8 ± 21.77	21.2 ± 2.08	56 ± 3.11	44 ± 3.11	2 ± 0.25	1.11 ± 0.07

Values are expressed as mean ± SE. Statistical significance between the 10 events of voluntary apnea with normal respiration: significant.