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Table 2 Classification characteristics of post-ectopic changes in variables

From: Extrasystoles for fluid responsiveness prediction in critically ill patients

 

Prediction at 10% SV change threshold

Prediction at 15% SV change threshold

Variable

ROC curve area

Spec (%)

Sens (%)

Threshold

ROC curve area

Spec (%)

Sens (%)

Threshold

SBPabs

0.78 [0.54; 1]

90

67

5.5 mmHg

0.66 [0.33; 0.99]

82

50

5.5 mmHg

PEPabs

0.74 [0.53; 0.95]

78

67

7.5 ms

0.73 [0.47; 1]

75

75

7.5 ms

PPabs

0.77 [0.52; 1]

78

83

8.46 mmHg

0.73 [0.36; 1]

75

75

8.46 mmHg

dP/dtabs

0.76 [0.53; 0.99]

85

67

0.195 mmHg/s2

0.64 [0.33; 0.94]

32

100

0.030 mmHg/s2

SBPrel

0.79 [0.52; 1]

100

67

5%

0.66 [0.27; 1]

95

50

5.5%

PEPrel

0.70 [0.50; 0.90]

65

83

2.5%

0.69 [0.44; 0.95]

68

75

3%

PPrel

0.70 [0.48; 0.93]

67

83

15%

0.71 [0.41; 1]

80

75

15%

dP/dtrel

0.68 [0.39; 98]

70

83

14%

0.68 [0.39; 0.98]

64

75

14%

  1. SBP systolic blood pressure, PEP pre-ejection period, PP pulse pressure, dP/dt maximal systolic upstroke, SV stroke volume, ROC receiver operating characteristic, Spec specificity, Sens sensitivity, rel post-ectopic change calculated on relative scale, abs post-ectopic change calculated on absolute scale