Table 7.
Median (Q1-Q3) presentation of changes in flow velocities rates through MCA after BHT and rest period in relation to groups of subjects.
| Subjects Groups | p * | ||
|---|---|---|---|
| COVID-19 | Controls | ||
| Relative change of velocities parameters after BHT compared to values at resting period (%) | |||
| ∆PSV (%) | 16 (11–18) | 41 (37–45) | <0.001 |
| ∆EDV (%) | 17 (15–24) | 32 (29–37) | <0.001 |
| ∆MV (%) | 22 (20–26) | 33 (28–39) | <0.001 |
| ∆RI (%) | 1.4 (−0.6 to 2.1) | −5 (−12 to −2) | <0.001 |
| ∆PI (%) | 3.3 (1.9–3.7) | −4 (−6 to −1.4) | <0.001 |
| BHI | 0.43 (0.35–0.54) | 0.97 (0.88–1.07) | <0.001 |
Legend: PSV—peak systolic velocity, EDV—end-diastolic velocity, MV—mean flow velocity, RI—resistance index, PI—pulsatility index, BHI—breath holding index. * Mann–Whitney U test.