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. 2023 May 22;13:8251. doi: 10.1038/s41598-023-35086-8

Table 4.

Detailed results for autonomic testing, Sudoscan and cardiological expertise (HR, heart rate; NP, not performed, patient unable to perform the maneuver correctly); POTS, postural orthostatic tachycardia syndrome; N, normal; AN, abnormal).

Patients Certain (C) or probable (P) SARS-CoV-2 infection Deep breath test Valsalva Heart-rate changes on standing Orthostatic hypotension Sudoscan/SSR Cardiologist expertise Schirmer (mm) (left/right)
1 C N N N Presence with increased heart rate N/N Orthostatic hypotension without dysautonomia 18/20
2 P N NP N N N/N N 19/18
3 C N N NP N N/N N  > 15/15
4 P AN N N N N/N Sinus tachycardia 1/1
5 C N N N N N/N N  > 15/15
6 C N NP N N AN (2 hands) N/N N  > 15/15
7 P N N N N N/N N 20/20
8 C N N N N N/N N 14/25
9 C N N N N N/N N 15/23
10 C AN N N N AN (4 limbs)/AN (4 limbs) Sinus tachycardia 20/20
11 C N N N N N/N Orthostatic tachycardia (no POTS) 20/20
12 C N N AN N N/N Sinus tachycardia 20/19
13 C AN AN N N Nl/AN (2 feet) N 0/0
14 C AN N N N N/N POTS 35/20
15 C N N N N N/N N 2/1
16 C N NP N N N/N N 15/25

Deep breath test, Valsalva and heart-rate changes on standing explored the parasympathetic nervous system; orthostatic hypotension, Sudoscan and SSR explored the sympathetic nervous system. Schirmer test is normal when the test strip is moistened over 10 mm after 5 min.