. Author manuscript; available in PMC: 2013 Feb 1.

Published in final edited form as: J Pediatr. 2011 Oct 11;160(2):222–226. doi: 10.1016/j.jpeds.2011.08.054

Table.

HR increment and orthostatic HR at 5 minutes of head-up tilt.

	Percentile (spot HR)			Percentile (average HR)
	90^th	95^th	97.5^th	90^th	95^th	97.5^th
Orthostatic HR increment (bpm)
Age 8–19 years	44.0	51.3	55.6	39.0	42.9	52.7
Absolute orthostatic HR (bpm)
Age 8–13 years	130.0	131.2	142.0	127.6	136.9	139.1
Age 14–19 years	107.0	119.5	123.5	106.7	116.0	120.6

Within the age group studied, there was no significant influence of age, sex, or BMI on the HR increment. There was an influence of age on orthostatic HR resulting in different values for different age groups.