Table 2 OI manifestations during the 10-minute NLT

Hemodynamics

 POTS or OH any time sequence

49

54

60

48

 POTS or OH last 3 min standing

35

40

47

33

POTS

 1 min standing

15

15

12

19

 3 min standing

19

25

27

23

 5 min standing

23

28

31

26

 10 min standing

33

40

42

38

OH

 SBP decrease of 20 mm Hg or more

1

6

2

1

 DBP decrease of 10 mm Hg or more

0

1

1

0

OI symptoms

 OI symptoms reported

21^a

55^a

63^c

48^c

 OI symptoms PLUS signs

8^b

25^b

31

20

 OI signs ONLY

31

27

28

25

 OI symptoms ONLY

20^a

50^a

60

42

 POTS with symptoms

33

36

40

32

 OH with symptoms

1

3

5

1