Table 3.
Effect of Applying Generic (Averaged) Boundary Conditions on Quantitative and Diagnostic Errors
| Basis Upon Which Subgroupings Were Averaged (CMVRtotal) | N Datasets | Error of vFFR Result | Bias (Mean Delta) | Diagnostic Accuracy |
|---|---|---|---|---|
| All cases | 73 | 0.11 ± 0.12 | 0.11 ± 0.12 | 75% |
| Baseline and hyperemic conditions | 73 | 0.096 ± 0.096 | 0.088 ± 0.104 | 52.1% |
| Right and left coronary arteries (under hyperemic conditions) | 40 | 0.078 ± 0.079 | 0.046 ± 0.102 | 80% |
| Artery-specific (LAD, RCA, DX, LMCA, LCX) (under hyperemic conditions) | 40 | 0.0050 ± 0.0046 | −2.6 e−5 ± 0.0068 | 82% |
| Case-specific (no averaging) | 73 | 0.0044 ± 0.0044 | −6.0 e−4 ± 0.0062 | 100% |
Values are mean ± SD unless otherwise indicated.
CMVRtotal = total coronary microvascular resistance; DX = diagonal artery; LAD = left anterior descending artery; LCX = left circumflex artery; LMS = left main coronary artery; RCA = right coronary artery; other abbreviations as in Table 2.