Table 2.
Correlation Between Absolute and Relative Changes in Septal LS and dFFR Values
| Absolute Change in Septal LS | Relative Change in Septal LS | |
|---|---|---|
| Univariate analysis | ||
| dFFR within MB | r=0.34, P=0.01 | r=0.33, P=0.02 |
| dFFR distal to MB | r=0.52, P=0.01 | r=0.52, P=0.001 |
| Length | r=−0.33, P=0.02 | r=−0.34, P=0.02 |
| Male sex | P=0.03 | P=0.03 |
| Multivariate analysis | ||
| Pattern 1 | R=0.60 | R=0.61 |
| dFFR distal to MB | β=0.51, P=0.001 | β=0.52, P=0.001 |
| Male sexa | β=−0.37, P=0.01 | β=−0.35, P=0.02 |
| Pattern 2 | R=0.456 | R=0.38 |
| dFFR within MB | β=0.27, P=0.047 | — |
| Male sexa | β=−0.34, P=0.01 | β=−0.38, P=0.01 |
Pattern 1 includes dFFR distal to the MB. Pattern 2 includes dFFR within the MB instead of distal to the MB. dFFR indicates diastolic fractional flow reserve; LS, longitudinal strain; MB, myocardial bridge.
a
MB length was left as an independent correlate of absolute change in septal LS instead of male sex when it was categorized using the median value.