Table 1.
Patients' characteristics for the whole studying population
| Variables | Whole study group (n = 32) | Duration of weaning <7 days (n = 20) | Duration of weaning ≥ 7 days (n = 12) | p value |
|---|---|---|---|---|
| Gender (m/f) | 26 (81%)/6 (19%) | 16/4 (80%/20%) | 10/2 (83%/17%) | NS |
| Age (years) | 63.31 ± 5.23 (55-77) | 63.85 ± 5.17 | 62.42 ± 5.45 | NS |
| BSA (m2) | 2 ± 0.29 (1.5-2.7) | 2 ± 0.3 | 1.9 ± 0.2 | NS |
| TAPSE (mm) | 17.43 ± 3.16(12.2-24.2) | 19.13 ± 2.59 | 14.59 ± 1.56 | <0.001 |
| Sm (cm/sec) | 10.51 ± 2.08 (7.6-15.4) | 11.62 ± 1.77 | 8.68 ± 0.94 | <0.001 |
| Em/Am | 2 ± 1.07 (0.4-3.4) | 2.62 ± 0.67 | 0.98 ± 0.80 | <0.001 |
| Ε/e' | 9.85 ± 1.86 (7-13.2) | 8.98 ± 1.70 | 11.31 ± 1.02 | <0.001 |
| LVEF (%) | 40.13 ± 3.77 (32-46) | 42.05 ± 3.05 | 36.92 ± 2.46 | <0.001 |
| RVFAC (%) | 28.06 ± 5.26 (18-38) | 30.95 ± 3.45 | 23.25 ± 4.11 | <0.001 |
| SBP (mm Hg) | 129.7 ± 12.9 (99-152) | 134.75 ± 8.50 | 121.50 ± 15.18 | <0.05 |
| PASP (mm Hg) | 44.78 ± 10.38 (30-62) | 38.65 ± 7.22 | 55 ± 5.59 | <0.001 |
| HR (beats/min) | 85.75 ± 5.57 (73-97) | 84.85 ± 5.72 | 87.25 ± 5.19 | NS |
| Duration of controlled ventilation (days) | 7 ± 3.18 (2-14) | 4.6 ± 1.17 | 8.1 ± 3.2 | <0.05 |
NS: no significant, m/f: male/female.
BSA: body surface area, TAPSE: tricuspid annular plane systolic excursion, Sm: systolic right ventricular (RV) tissue Doppler imaging (TDI) velocity, Em/Am: ratio of early (Em) vs late (Am) diastolic RV TDI velocities, Ε/e' lateral: ratio of maximal velocities of mitral PW Doppler E wave and TDI e' wave of the mitral annulus at the level of lateral wall, LVEF: left ventricular ejection fraction, RVFAC: right ventricular fractional area change, SBP: systolic blood pressure, PASP: pulmonary artery systolic pressure, HR: heart rate. Values are expressed as mean ± standard deviation (range).