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Table 1 Characteristics of the general population and comparison between responders and non-responders at baseline (before fluid challenge)

From: Respiratory variations of inferior vena cava diameter to predict fluid responsiveness in spontaneously breathing patients with acute circulatory failure: need for a cautious use

  All patients (n= 40) Responders (n = 20) Non-responders (n = 20) P-value
Age, years 63 (56, 70) 61 (49, 70) 66 (53, 75) 0.58
Weight, Kg 72 (65, 77 67 (63, 76) 76 (63, 88) 0.14
Height, cm 169 (164, 173) 170 (162, 176) 168 (160, 173) 0.38
APACHE II score 17 (14, 23) 18 (14, 29) 14 (11, 21) 0.30
Heart rate, bpm 101 (91, 116) 101 (91, 125) 103 (79, 121) 0.78
Mean arterial pressure, mmHg 71 (66, 77) 70 (61, 88) 72 (65, 87) 0.56
LVEF, % 55 (50, 60) 55 (50, 60) 55 (47, 60) 0.41
Velocity time index, cm 16 (14, 18) 14 (12, 16) 17 (15, 21) < 0.01
E velocity, cm/s 75 (70, 80) 65 (53, 76) 82 (75, 93) < 0.01
E/A velocity ratio 0,9 (0.8, 1.1) 0,8 (0,6, 1,1) 1,0 (0,8, 1,4) < 0.01
Ea velocity, cm/s 12 (10, 13) 12 (9, 14) 11 (9, 15) 0.79
E/Ea velocity ratio 6 (5, 8) 5 (5, 10) 7 (5, 8) 0.40
cIVC, % 34 (16, 64) 64 (28, 100) 19 (5, 35) < 0.01
  1. Data are expressed in medians with 5th and 95th percentiles. APACHE: Acute Physiology and Chronic Health Evaluation; cIVC, collapsibility index of the inferior vena cava.