Diagnostic value of the 1651 AU threshold to correctly classified AS severity in the testing set using DSE as reference
| Testing set (N=47) | Severe AS | Non-severe AS | |
| CS ≥1651 | 36 | 1 | Positive-predictive value 97% |
| CS <1651 | 2 | 8 | Negative-predictive value 80% |
| Sensitivity 95% | Specificity 89% |
| Low gradient/low flow AS (N=18) | Severe AS | Non-severe AS | |
| CS ≥1651 | 13 | 1 | Positive-predictive value 93% |
| CS <1651 | 1 | 3 | Negative-predictive value 75% |
| Sensitivity 93% | Specificity 75% |
Top, overall testing set and bottom, subgroup of patients with low flow/low gradient aortic stenosis (AS). Two patients with non-conclusive dobutamine stress echocardiography (DSE) were excluded from the present analysis.
AU, arbitrary units; CS, calcium scoring.