Table 2.
Linear regression analysis for association between LA parameters, clinical or other echocardiographic variables, and peak VO2 (mL/kg/min): P‐value, b coefficient (95% confidence interval)
| LA reservoir strain, % | LA contractile strain, % | LA conduit strain, % | LA volume index, mL/m2 | |
|---|---|---|---|---|
| Univariate | <0.0001; 0.21 (0.14–0.28) | <0.0001; 0.29 (0.16–0.44) | <0.0001; 0.32 (0.18–0.46) | 0.002; −0.05 (−0.08 to −0.02) |
| Model 1 | <0.0001; 0.22 (0.12–0.31) | 0.001; 0.33 (0.15–0.52) | <0.0001; 0.35 (0.17–0.53) | 0.1; −0.03 (−0.09 to 0.01) |
| Model 2 | <0.0001; 0.16 (0.08–0.24) | 0.003; 0.23 (0.08–0.37) | 0.007; 0.20 (0.06–0.35) | 0.06; −0.03 (−0.06 to 0.001) |
LA, left atrial; VO2, oxygen consumption.
Model 1: adjusted for age, body mass index, New York Heart Association class, atrial fibrillation/sinus rhythm, haemoglobin, and creatinine. Model 2: adjusted for left ventricular ejection fraction and tricuspid annular plane systolic excursion.