Table 4.
Echo-Quantified RV Parameters in Relation to CMR Quantified RV Volumes and Function
| Correlation Coefficient (r) | P | Regression Equation | |
|---|---|---|---|
|
Diastolic Chamber Size | |||
| Linear parameters | |||
| Basal RV width | 0.70 | <0.001 | y = 4.33x − 19.0 |
| Mid RV width | 0.60 | <0.001 | y = 3.80x + 38.3 |
| RV length | 0.61 | <0.001 | y = 2.60x − 67.7 |
| Proximal RVOT width | 0.68 | <0.001 | y = 5.10x − 26.0 |
| Distal RVOT width * | 0.43 | <0.001 | y = 3.76x + 48.5 |
| Area (4-chamber) | 0.60 | <0.001 | y = 4.47x + 58.8 |
|
Systolic Chamber Size | |||
| Linear parameters | |||
| Basal RV width | 0.68 | <0.001 | y = 3.43x − 28.3 |
| Mid RV width | 0.64 | <0.001 | y = 3.74x − 3.1 |
| RV length | 0.65 | <0.001 | y = 2.31x − 96.2 |
| Proximal RVOT width | 0.66 | <0.001 | y = 3.87x − 31.7 |
| Distal RVOT width * | 0.46 | <0.001 | y = 3.51x + 1.2 |
| Area (4-chamber) | 0.67 | <0.001 | y = 4.80x + 18.0 |
|
Contractile Function | |||
| Fractional Shortening | |||
| Basal RV width | 0.31 | <0.001 | y = 0.36x + 46.8 |
| Mid RV width | 0.31 | <0.001 | y = 0.26x + 47.9 |
| RV length | 0.13 | 0.04 | y = 0.22x + 54.0 |
| Proximal RVOT width | 0.38 | <0.001 | y = 0.50x + 44.1 |
| Distal RVOT width | 0.22 | <0.001 | y = 0.29x + 48.8 |
| Fractional area change | 0.55 | <0.001 | y = 0.47x + 33.4 |
| RVS’ | 0.36 | <0.001 | y = 1.86x + 35.3 |
| TAPSE | 0.48 | <0.001 | y = 12.52x + 31.5 |
*
Unobtainable in 6 patients (2%) due to absence of distal RVOT image acquisition