Table 2.
Echocardiographic Parameters of Study Sample
| Variable |
Total N=2268 |
Earlier Surgery N=950 |
Class I Indication N=1318 |
|---|---|---|---|
| LV ejection fraction, % | 62±6 | 62±6 | 62±5 |
| Indexed LV end‐diastolic dimension, cm/m2 | 2.1±0.3 | 2.1±0.4 | 2.1±0.3 |
| Indexed LV end‐systolic dimension, cm/m2 | 1.2±0.3 | 1.2±0.3 | 1.2±0.4 |
| Maximal basal septal LV thickness, cm | 2.0±0.3 | 2.0±0.4 | 2.0±0.2 |
| Indexed left atrial dimensions, cm/m2 | 2.2±0.4 | 2.2±0.4 | 2.2±0.3 |
| Resting mitral regurgitation | |||
| Trivial‐mild | 1452 (64%) | 627 (66%) | 825 (63%) |
| ≥Moderate | 816 (36%) | 323 (34%) | 493 (37%) |
| Resting LVOT gradient, mm Hg | 61±44 | 61±43 | 61±39 |
| Maximal LVOT gradient, mm Hg* | 100±31 | 100±31 | 100±3 |
LVOT indicates left ventricular outflow tract.
*
Provocation used in 1214 (53%) patients in the whole group (950 [100%] in earlier surgery group and 264 [20%] in class I group whose presenting symptom was angina and not dyspnea).