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Table 2 Hemodynamic parameters at baseline and after 500 ml volume expansiona

From: Respiratory pulse pressure variation fails to predict fluid responsiveness in acute respiratory distress syndrome

  Before volume expansion After volume expansion
Hemodynamic parameter Responders Nonresponders Responders Nonresponders
Heart rate, beats/min 101 ± 25 99 ± 24 98 ± 25c 95 ± 23c
Arterial pressure, mmHg 68 ± 12 73 ± 12 80 ± 16c 80 ± 14c
Central venous pressure, mmHg 9.5 ± 4.3 11.8 ± 4.4b 12.3 ± 4.8c 15.6 ± 4.8c
PAOP, mmHg (n = 33) 9.6 ± 3.3 13.2 ± 3.7b 14.9 ± 6.1c 17.5 ± 3.7c
Transmural PAOP (n = 33) [20] 6.2 ± 3.8 10.1 ± 3.9b 10.9 ± 6.5c 14.2 ± 4.1c
pulse pressure (mmHg) 49 ± 14 56 ± 14b 64 ± 18c 59 ± 16
ΔRESPPP, % 7.4 ± 5.2 3.8 ± 4.2b 4.9 ± 4.2c 2.9 ± 3
dDown, mmHg (n = 45) 6.5 ± 4.4 1.8 ± 2.5b 1.9 ± 5.4c 1.2 ± 1.6
SPV, mmHg 5.7 ± 4.3 2.8 ± 2.8b 4.8 ± 3.2c 2.2 ± 1.6
Pulmonary arterial pressure, mmHg (n = 33) 25 ± 6 29 ± 5b 29 ± 7c 35 ± 6 c
Cardiac index, l/min/m2 3.3 ± 1.5 3.6 ± 1.4 4.2 ± 1.8c 3.5 ± 1.4
  1. aPAOP, pulmonary artery occlusion pressure; ΔRESPPP, respiratory variations of pulse pressure; dDown, difference between the average, over three consecutive respiratory cycles, of the minimal value of systolic blood pressure during a respiratory cycle and the value of systolic blood pressure during apnea; SPV, respiratory changes in systolic arterial pressure over three consecutive respiratory cycles; bP < 0.05 (responders versus nonresponders); cP < 0.05 for comparison between before and after volume expansion.
  2. Quantitative variables are expressed as mean ± SD.