Table 2 Characterization of patients with IST.

From: Inappropriate sinus tachycardia in post-COVID-19 syndrome

 

Reference values

Mean values

Laboratory tests

NT-proBNP (pg/mL)

< 125

67.6 ± 59.6

Hs-Troponin I (pg/mL)

< 14

3.09 ± 4.2

Leucocytes (× 109/L)

4.00–11.00

6.83 ± 1.7

Hemoglobin (g/dL)

12.0–16.0

13.4 ± 0.7

TSH (µm/U)

0.350–4.940

1.4 ± 0.5

IL-6 (pg/mL)

0–6.40

2.2 ± 1.1

Ferritin (ng/mL)

15–160

50.4 ± 37.4

C-reactive protein (mg/L)

0.00–5.00

1.1 ± 1.3

D-Dimer (ng/mL)

0–500

247.7 ± 133.2

Fibrinogen

150–450

374.9 ± 54.1

24-h urine 3-Metoxiadrenaline (mg/L)

0.02–0.350

0.123 ± 0.120

24-h urine 3-Metoxinoradrenaline (mg/L)

0.03–0.440

0.178 ± 0.189

Exercise capacity test

6MWT (m)

 

392.7 ± 83.2

6MWT theoretical (%)

 

60.1 ± 12.1

Quality of life test (EQ-5D-5L)

Score reference valuesa

Mean values

Mobility

1–5

3.6 ± 1.1

Self-care

1–5

2.4 ± 1.2

Usual activities

1–5

3.5 ± 0.9

Pain/discomfort

1–5

3.0 ± 1.0

Anxiety/depression

1–5

2.9 ± 1.2

Health state scale (Visual Analogue Scale)

0–100

39.6 ± 20.7

  1. Values are expressed as mean ± standard deviation unless otherwise stated.
  2. NT-proBNP N-terminal pro B-type natriuretic peptide, TSH thyroid-stimulating hormone, IL-6 interleukin-6, 6MWT 6-min walking test, EQ-5D 5-L EuroQol 5-Dimension 5-Level.
  3. aScore values for each health dimension: 1: No problems, 2: Slight problems, 3: Moderate problems, 4: Severe problems, 5: Unable/Extreme. For Health state scale, 0 means the best health you can imagine, 100 means the worst health you can imagine.
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