Development of Cardiovascular Indices of Acute Pain Responding in Infants: A Systematic Review

Table 6

Mean and standard deviations for high frequency heart rate variability in response to acute pain at less than 7 postnatal days.

Gestational age	Reference	Mean HF HRV	SD
28–32 weeks	Cong et al. [39]	23.52	35.96
37–42 weeks	de Oliveira et al. [42]	0.44	0.69
	Greenberg [46]	2.5	N/A
	Lindh et al. [55]	3.4	0.60
	Lindh et al. [54]	3.23	0.45
	Oberlander et al. [57]	2.0	N/A
	Weissman et al. [71]	0.76	0.50

Note. HRV = heart rate variability, HF = high frequency, SD = standard deviation, and denotes numbers that were extrapolated from graphs.