Research Article
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 [msec2] | 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 |
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LF: low frequency HF: high frequency α: baroreflex sensitivity JHS/EDS-HT versus controls; JHS/EDS-HT versus controls.
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