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Table 5 Haemodynamic variables before and at the end of SBT

From: Cardiac dysfunction induced by weaning from mechanical ventilation: incidence, risk factors, and effects of fluid removal

    P values
  Baseline At the end of SBT At the end of SBT vs. baseline Succeeded SBT vs. failed SBT at baseline Succeeded SBT vs. failed SBT at the end of SBT Cases with WiPO vs. cases without WiPO at baseline Cases with WiPO vs. cases without WiPO at the end of SBT
Heart rate (beats/min)
 Succeeded SBT (n = 155) 91 ± 15 93 ± 16 0.093     
 Failed SBT (n = 124) 91 ± 15 101 ± 18 0.000 0.80 <0.01   
  Cases with WiPO (n = 75) 89 ± 15 102 ± 18 0.000     
  Cases without WiPO (n = 49) 93 ± 14 99 ± 17 0.011    0.10 0.37
Systolic arterial pressure (mmHg)
 Succeeded SBT (n = 155) 134 ± 22 136 ± 22 0.214     
 Failed SBT (n = 124) 135 ± 23 144 ± 26 0.000 0.70 <0.01   
  Cases with WiPO (n = 75) 138 ± 23 152 ± 26 0.000     
  Cases without WiPO (n = 49) 130 ± 22 131 ± 22 0.716    0.06 <0.01
Mean arterial pressure (mmHg)
 Succeeded SBT (n = 155) 89 ± 13 88 ± 14 0.478     
 ailed SBT (n = 124) 90 ± 15 94 ± 18 0.002 0.87 <0.01   
  Cases with WiPO (n = 75) 92 ± 16 100 ± 18 0.000     
  Cases without WiPO (n = 49) 87 ± 15 87 ± 15 0.983    0.09 <0.01
Diastolic arterial pressure (mmHg)
 Succeeded SBT (n = 155) 67 ± 11 68 ± 12 0.764     
 Failed SBT (n = 124) 66 ± 12 69 ± 14 0.021 0.53 0.35   
  Cases with WiPO (n = 75) 67 ± 12 72 ± 14 0.006     
  Cases without WiPO (n = 49) 65 ± 11 65 ± 12     0.30 0.01
Cardiac index (L/min/m2)
 Succeeded SBT (n = 40) 3.4 ± 0.7 3.9 ± 1 0.000     
 Failed SBT (n = 45) 3.2 ± 0.7 3.6 ± 1 0.001 0.13 0.13   
  Cases with WiPO (n = 30) 3.2 ± 0.7 3.8 ± 1 0.000     
  Cases without WiPO (n = 15) 3.1 ± 0.6 3.1 ± 1 1.000    0.79 0.02
Global end-diatolic volume (mL/m2)
 Succeeded SBT (n = 40) 825 ± 254 880 ± 177 0.199     
 Failed SBT (n = 45) 815 ± 225 916 ± 287 0.002 0.88 0.59   
  Cases with WiPO (n = 30) 849 ± 133 1032 ± 233 0.000     
  Cases without WiPO (n = 15) 632 ± 166 624 ± 187 0.718    0.01 <0.01
Extravascular lung water (mL/kg)
 Succeeded SBT (n = 40) 10 ± 5 11 ± 3 0.874     
 Failed SBT (n = 45) 11 ± 3 12 ± 4 0.020 0.91 0.09   
  Cases with WiPO (n = 30) 11 ± 3 14 ± 4 0.030     
  Cases without WiPO (n = 15) 9 ± 5 10 ± 1 0.296    0.05 0.01
  1. Values are expressed as mean ± standard deviation
  2. SBT spontaneous breathing trial, WiPO weaning-induced pulmonary oedema