Table 3.
Difference and correlation between mean gradient measurements obtained by different modalities before and after transcatheter aortic valve replacement.
| Modality | Absolute mean differencea | P value | Pearson correlation |
|---|---|---|---|
| Pre-TAVR mean gradient | |||
| OpSens vs cath | 2.2 ± 3.5 | 1.00 | 0.96 |
| OpSens vs TEE | 3.0 ± 3.2 | .30 | 0.96 |
| OpSens vs TTE | 7.8 ± 7.5 | .32 | 0.70 |
| Cath vs TEE | 3.5 ± 3.0 | .33 | 0.96 |
| Cath vs TTE | 6.7 ± 5.1 | .20 | 0.84 |
| TEE vs TTE | 5.8 ± 6.0 | .44 | 0.81 |
| Post-TAVR mean gradient | |||
| OpSens vs cath | 1.2 ± 1.3 | .16 | 0.89 |
| OpSens vs TEE | 3.1 ± 1.9 | <.0001 | 0.61 |
| OpSens vs TTE | 3.2 ± 1.7 | <.0001 | 0.71 |
| Cath vs TEE | 3.9 ± 2.0 | <.0001 | 0.55 |
| Cath vs TTE | 3.6 ± 2.2 | <.0001 | 0.75 |
| TEE vs TTE | 1.8 ± 1.7 | 1.00 | 0.63 |
Cath, catheterization using 2-pigtail catheters; OpSens, OpSens OptoWire III; TAVR, transcatheter aortic valve replacement; TEE, transesophageal echocardiogram; TTE, transthoracic echocardiogram.
a
Values are given as mm Hg ± standard deviation.