Usefulness of the velocity–time integral of the left ventricular outflow tract variability index to predict fluid responsiveness in patients undergoing cardiac surgery

Table 4 Diagnostic accuracy of VTI-LVOT variability index to predict fluid responsiveness compared to pulse pressure variation

	VTI-LVOT variability index at admission Estimate 95% CI	VTI-LVOT variability index at 6 h Estimate 95% CI
Sensitivity	0.706 [0.538 to 0.832]	0.444 [0.246 to 0.663]
Specificity	0.938 [0.717 to 0.989]	0.926 [0.766 to 0.979]
PPV	0.96 [0.805 to 0.993]	0.8 [0.49 to 0.943]
NPV	0.6 [0.407 to 0.766]	0.714 [0.549 to 0.837]
LR +	11.387 [1.672 to 76.277]	6 [1.436 to 25.075]
LR −	0.313 [0.184 to 0.536]	0.6 [0.392 to 0.919]
Accuracy	78%	73.3%

VTI-LVOT velocity–time integral of the left ventricular outflow tract, PPV positive predictive value, NPV negative predictive value, LR likelihood ratio

ISSN: 2055-0464