Comparison of echocardiographic indices of right ventricular systolic function and ejection fraction obtained with continuous thermodilution in critically ill patients

Table 3 Diagnostic accuracy of reduced right ventricular ejection fraction with echocardiographic indices at their recommended thresholds

Indices	Sp	Se	NPV	PPV
TAPSE < 16 mm	100 [100–100]	56 [31–81]	56 [45–75]	100 [100–100]
S′ < 10 cm/s	100 [100–100]	38 [63–88]	60 [47–82]	100 [100–100]
RIMP < 0.55	33 [11–67]	94 [81–100]	75 [29–100]	71 [63–84]
IVA < 2.2 m/s²	56 [22–89]	56 [31–81]	42 [20–64]	69 [50–91]
FAC < 35%	38 [0–75]	53 [27–80]	30 [0–55]	62 [42–80]
EDDr > 1	100 [100–100]	33 [13–60]	47 [41–60]	100 [100–100]

Reduced RVEF is defined as lower than 35%. The tested threshold of the echocardiographic indices are those recommended in the guidelines [5]
RVEF right ventricular ejection fraction, TAPSE tricuspid annular plane systolic excursion, S′ pic systolic velocity of pulsed tissue Doppler at tricuspid annular, RIMP right ventricular index of myocardial performance, IVA isovolumic acceleration, FAC fractional area change, EDDr end-diastolic diameter ratio, Sp specificity, Se sensitivity, NPV negative predictive value, PPV positive predictive value

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