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

Table 4

Heart rate and blood pressure responses after head-up tilt test.

	HR response; ratio (%)	HR mean difference; (bpm ± SD)		BP response; ratio (%)	SBP mean difference; (mmHg ± DS)	DBP mean difference (mmHg ± DS)
Normal; (HR increase between 10 and 19 bpm)	7/35 (20)	12.5 ± 2.3	Normal	34/35 (97)	5.9 ± 5.8	6.5 ± 5.8
POTS; (HR increase > 30 bpm)	17/35 (48.6)	32 ± 6.5	Orthostatic hypotension  (reduced peripheral vessel response)	1/35 (3)
Reduced orthostatism tolerance; (HR increase from 20 to 29 bpm)	11/35 (31.4)	20.4 ± 1.4

HR: heart rate. BP: blood pressure. DBP: diastolic blood pressure. SBP: systolic blood pressure.