Table 4 Diagnostic performance of quantitative stress contrast echocardiography
Cut-offHyperaemic βHyperaemic MBFβ-reserveMBFR
(15.876 min−1)(2.087 ml.min−1.g−1)(1.76)(1.94)
Sensitivity76% (34/45)73% (33/45)87% (39/45)89% (40/45)
Specificity73% (61/83)78% (65/83)83% (69/83)92% (76/83)
PPV61% (34/56)65% (33/51)74% (39/53)85% (40/47)
NPV85% (61/72)84% (65/77)92% (69/75)94% (76/81)
Accuracy74% (95/128)77% (98/128)84% (108/128)91% (116/128)
AUC0.7650.7910.8990.928
CI0.683/0.8470.713/0.8700.833/0.9660.862/0.994
  • Accuracy indicates probability of correct result.

  • AUC, area under the receiver-operating characteristic curve; β, blood volume exchange frequency; CI, confidence interval; MBF, myocardial blood flow; MBFR, myocardial blood flow reserve. NPV, negative predictive value; PPV, positive predictive value.