Smart Device for the Determination of Heart Rate Variability in Real Time

Table 2

Comparison of the results obtained with the prototype in the second set of experiments with respect to other studies (mean, standard deviation (SD), maximum (M), and minimum of , , and ).

			This work	[27]	[28]	[37]	[38]	[23]	[39]
(%)	Rest	Mean	42.7	71	56	61	74.6
		SD	13.6	6	17		14.5
		Maximum	54.8			73
		Minimum	16.4			48
	Tilt	Mean	78.3	85	83	69	76.4
		SD	11.8	4.5	12		14.4
		Maximum	93.5			80
		Minimum	63.1			56
(%)	Rest	Mean	53.3	29	44	39	26.3
		SD	14	6	17		10.9
		Maximum	80.1			52
		Minimum	43.7			27
	Tilt	Mean	19.7	15	17	31	20.3
		SD	11.2	4.8	12		10.1
		Maximum	36.2			44
		Minimum	6.1			20
	Rest	Mean	0.89	2.47	1.7	1.5	3.4	1.69	1.15
		SD	0.36	1.01	1.4		1.6	0.42	0.3
		Maximum	1.23			2.16
		Minimum	0.2			0.9
	Tilt	Mean	6.64	5.56	8.4	2.1	5.3	10.4	4
		Mean	5.16	2.48	6.9		3.8	1.82	1
		Maximum	15.32			4.1
		Minimum	1.74			1.3