Table 2. Comparison of conventional echocardiography and myocardial work data in SLE and controls.
| Variables | Controls (N=99) | SLE (N=132) | P value |
|---|---|---|---|
| LAD (mm) | 31.32±2.71 | 31.45±3.26 | 0.745 |
| LAVI (mL/m2) | 28.19 (27.06–29.87) | 29.73 (28.7–30.96) | <0.001 |
| IVSd (mm) | 9.00 (8.00–10.00) | 9.00 (8.00–10.00) | 0.316 |
| PWTd (mm) | 9.00 (8.00–9.00) | 9.00 (8.00–10.00) | 0.420 |
| E/A ratio | 1.29 (1.18–1.43) | 1.28 (0.79–1.59) | 0.394 |
| E/e’ ratio | 8.55 (7.60–9.42) | 9.90 (8.34–12.32) | <0.001 |
| Tei index | 0.29 (0.23–0.36) | 0.29 (0.24–0.35) | 0.855 |
| LVEDVI (mL/m2) | 56.32±5.71 | 55.03±8.02 | 0.152 |
| LVESVI (mL/m2) | 20.58±3.07 | 21.69±4.35 | 0.816 |
| LVEF (%) | 63.51±3.72 | 62.48±4.36 | 0.060 |
| SV | 55.70±6.14 | 54.04±7.78 | 0.072 |
| GLS (%) | −20.22±1.63 | −18.60±1.92 | <0.001 |
| PSD (ms) | 38.42±9.59 | 47.96±15.34 | <0.001 |
| GWE (%) | 97 [96–98] | 95 [94–97] | <0.001 |
| GWI (mmHg%) | 1,865±325 | 1,846±334 | 0.657 |
| GCW (mmHg%) | 2,103±309 | 2,198±318 | 0.024 |
| GWW (mmHg%) | 66 [45–109] | 109 [82–150] | <0.001 |
Continuous values are presented as mean ± standard deviation (normally distributed) or median (range) (non-normally distributed). LAD, left atrial diameter; LAVI, left atrial volume index; IVSd, interventricular septum thickness in diastole; PWTd, posterior wall thickness in diastole; E/A, peak early diastolic velocity/peak late diastolic velocity; E/e’, peak early diastolic velocity (by pulsed-wave Doppler)/early diastolic peak velocity (by tissue Doppler); LVEDVI, left ventricular end-diastolic volume index; LVESVI, left ventricular end- systolic volume index; LVEF, left ventricular ejection fraction; SV, stroke volume; GLS, global longitudinal strain; PSD, peak strain dispersion; GWE, global work efficiency, GWI, global work index; GCW, global constructive work; GWW, global wasted work.