Correlation between Palpitations below the Heart in Traditional Chinese Medicine and Autonomic Nerve Function Based on Heart Rate Variability: A Case-Control Study

Table 3

HRV indexes of the same group in different periods of day and night.

		Normal group			Palpitations below the heart group
		Day time	Nighttime		Day time	Nighttime
Time domain indexes	SDNN	99.25 ± 19.54	148.13 ± 15.36	<0.001	103.50 (89.25, 114.50)	158.38 ± 46.10	0.009
	RMSSD	23.50 (22.00, 30.50)	49.25 ± 11.40	0.001	33.19 ± 8.18	54.81 ± 19.42	<0.001
	pNN50	4.00 (3.00, 9.50)	24.38 ± 9.18	0.001	11.63 ± 5.93	30.44 ± 14.17	<0.001
Frequency domain indexes	TP	1940.03 ± 411.77	2892.81 ± 798.83	0.004	1945.62 ± 406.98	2366.20 (1826.23, 3261.98)	0.006
	LF	622.01 ± 194.71	845.28 ± 326.74	0.012	548.48 ± 115.21	575.30 (431.90, 770.00)	0.163
	HF	147.85 (110.98, 209.18)	652.93 ± 327.21	0.004	221.85 (175.25, 408.78)	602.50 (364.30, 1465.45)	0.001
	LF/HF	3.87 ± 1.60	1.59 ± 0.93	0.002	2.38 ± 1.26	1.05 (0.62, 1.26)	0.005