Table 2.

Values are Z-scores derived from age-dependency in controls

	TCPC no SND (n = 90)	TCPC/SND no PM (n = 11)	TCPC PM/SND (n = 12)	ANOVA p value
RR interval	0.20 (1.14)	3.11 (1.12)*,†	3.49 (1.76)*,†	< 0.001
SD1	− 1.05 (1.67)*	1.34 (0.91)*,†	1.27 (0.96)*,†	< 0.001
SD2	− 0.34 (1.67)	2.62 (1.11)*,†	1.53 (1.57)*,†,#	< 0.001
SD1/SD2	−0.68 (0.95)*	0.04 (0.63)†	0.82 (1.25)*,†,#	< 0.001
Ptot	−1.39 (2.17)*	1.80 (0.94)*,†	0.87 (1.13)†	< 0.001
PVLF	−1.09 (2.26)*	2.55 (0.98)*,†	1.11(1.38)*,†,#	< 0.001
PLF	−1.81 (2.67)*	1.59 (1.01)†	0.88 (1.39)†	< 0.001
PHF	−1.48 (1.91)*	0.88 (0.97)†	0.45 (0.99)†	< 0.001
PLF/PHF	0.29 (0.93)	− 0.10 (0.99)	− 0.10 (1.01)	0.18

p values were derived from analysis of variance (ANOVA) post hoc tests

total power, P_VLF power of very low frequency component, P_LF power of low frequency component, P_HF power of high frequency component, SD1 and SD2 Poincaré plot measures (see text for explanation), TCPC total cavopulmonary connection, SND sinus node dysfunction, PM pacemaker

*p < 0.05 versus controls

^†p < 0.05 versus TCPC without SND

^#p = 0.06 TCPC/SND versus TCPC/SND/PM