Table 1.
Cardiac magnetic resonance accuracy: Acquisition vs reference flow
| Valve type | Absolute Δ Acquisitions vs reference (%) ± SD |
p value of acquisitions vs reference | PCC r (3)= | p value of PCC | p value of Δ AA level vs LVOT level |
|---|---|---|---|---|---|
| Antegrade flow | |||||
| Native valve | |||||
| Within valve | 4.5 ± 3.0 | 0.028 | 0.999 | < 0.001 | |
| Sapien XT | 0.022 | ||||
| AA level | 9.1 ± 4.0 | 0.007 | 1.000 | < 0.001 | |
| Within THV | 20.9 ± 5.5 | 0.005 | 0.996 | < 0.001 | |
| LVOT level | 4.6 ± 2.4 | 0.203 | 0.996 | < 0.001 | |
| CoreValve | 0.009 | ||||
| AA Level | 18.7 ± 7.7 | 0.007 | 0.978 | 0.004 | |
| Within THV | 45.9 ± 18.5 | 0.005 | 0.713 | 0.176 | |
| LVOT level | 4.9 ± 4.4 | 0.959 | 0.994 | 0.001 | |
| Retrograde flow | |||||
| Sapien XT | 0.037 | ||||
| AA level | 9.4 ± 7.0 | 0.017 | 0.994 | < 0.001 | |
| Within THV | 68.8 ± 19.5 | 0.005 | 0.712 | 0.177 | |
| LVOT level | 16.5 ± 7.4 | 0.005 | 0.987 | 0.002 | |
| CoreValve | 0.005 | ||||
| AA level | 5.2 ± 1.6 | 0.005 | 1.000 | < 0.001 | |
| Within THV | 70.7 ± 9.8 | 0.005 | 0.984 | 0.002 | |
| LVOT level | 14.2 ± 4.7 | 0.005 | 0.998 | < 0.001 | |
PCC Pearson correlation coefficient, AA ascending aorta, LVOT left ventricular outflow tract, THV transcatheter heart valve. Δ= difference. Italicized levels and values indicate best slice position