Table 4. Comparisons of left atrial echocardiographic and electrocardiographic parameters between rheumatoid arthritis patients and the control group.
| Controls (n = 30) | RA patients (n = 38) | p-value | |
| LAVImax (ml/m2) | 19.7 ± 3.9 | 23.4 ± 3.3 | < 0.001 |
| LAVIpreA (ml/m2) | 15.1 ± 3.3 | 17.1 ± 3.4 | < 0.01 |
| LAVImin (ml/m2) | 10.9 ± 3.2 | 10.9 ± 2.6 | 0.915 |
| Pmax (ms) | 83.3 ± 9.5 | 88.6 ± 9.0 | < 0.05 |
| Pmin (msec) | 41.3 ± 5.7 | 43.1 ± 7.3 | 0.255 |
| P dispersion (msec) | 42.0 ± 8.0 | 45.5 ± 6.4 | 0.056 |
| LA global strain (%) | 34.1 ± 10.1 | 28.3 ± 13.4 | < 0.05 |
| LA global systolic strain rate (/s) | 1.8 ± 0.3 | 1.7 ± 0.3 | 0.053 |
| LA global early diastolic strain rate (/s) | –1.2 ± 0.2 | –1.2 ± 0.3 | 0.434 |
| LA global late diastolic strain rate (/ | –1.0 ± 0.3 | –1.1 ± 0.2 | 0.492 |
Values are expressed as mean ± SD.
LA = left atrium, LAVI = left atrial volume index, P = electrocardiographic P wave.