Orthostatic Intolerance and Postural Orthostatic Tachycardia Syndrome in Joint Hypermobility Syndrome/Ehlers-Danlos Syndrome, Hypermobility Type: Neurovegetative Dysregulation or Autonomic Failure?

Table 5

Spectral parameters of heart rate variability and baroreflex sensitivity estimation.

	JHS/EDS-HT ()			Controls ()
	Rest	TILT	P	Rest	TILT	P
			(rest versus tilt)			(rest versus tilt)
Mean RR [s]	0.91 ± 0.14	0.73 ± 0.12	<0.001	0.89 ± 0.10	0.76 ± 0.1	<0.001
Tot power [msec^2]	3281 ± 2875	2187 ± 1423	n.s	2419 ± 1430	1961 ± 957	n.s
LF power (u.n.)	57.0 ± 21.7	82.7 ± 10.9	<0.001	57.5 ± 18.4	82.3 ± 14.6	<0.001
HF power (u.n.)	43.0 ± 21.7	17.3 ± 10.9	<0.001	42.5 ± 18.4	17.7 ± 14.6	<0.001
LF/HF	2.18 ± 1.99	8.36 ± 8.75	<0.001	1.98 ± 1.96	12.0 ± 13.0	<0.002
[msec/mmHg]	59.1 ± 36.9^++	22.0 ± 9.6	<0.001	35.5 ± 11.0	18.5 ± 8.6	<0.001
[msec/mmHg]	21.6 ± 11.8^+	11.5 ± 5.8	<0.001	15.9 ± 5.8	10.8 ± 4.3	<0.001
[msec/mmHg]	37.5 ± 29.4^++	10.4 ± 5.2	<0.001	19.7 ± 7.8	7.7 ± 4.9	<0.005

LF: low frequency
HF: high frequency
α: baroreflex sensitivity
JHS/EDS-HT versus controls; JHS/EDS-HT versus controls.