Table 2.
Imaging Characteristics of the Study Sample
| Variable | Total (N=1110) | Nonobstructive (N=513) | Obstructive (N=597) | P Value | |
|---|---|---|---|---|---|
| No SRT in Follow‐Up (N=02) | SRT in Follow‐Up (N4=195) | ||||
| LV ejection fraction, % | 62±5 | 61±6 | 62±6 | 62±5 | 0.18 |
| LV mass index, g/m2 | 127±43 | 124±40 | 125±45 | 141±45 | <0.001 |
| Indexed LV end‐diastolic dimension. cm/m2 | 1.9±0.3 | 1.9±0.4 | 1.9±0.4 | 1.9±0.3 | 0.72 |
| Indexed LV end‐systolic dimension, cm/m2 | 0.9.0±0.3 | 1.0±0.3 | 0.9±0.3 | 0.9±0.4 | 0.54 |
| Maximal LV thickness, cm | 1.7±0.4 | 1.6±0.3 | 1.7±0.4 | 1.9±0.4 | <0.001 |
| Maximal posterior wall thickness, cm | 1.2±0.3 | 1.1±0.3 | 1.2±0.3 | 1.2±0.4 | 0.23 |
| Indexed left atrial dimensions, cm/m2 | 2.4±0.3 | 2.4±0.4 | 2.3±0.4 | 2.3±0.3 | 0.62 |
|
Moderate or greater resting mitral regurgitation, n (%) Trivial‐mild |
302 (27 | 94 (18) | 120 (30) | 88 (45) | <0.001 |
| SAM of mitral valve, n (%) | 684 (62) | 87 (17) | |||
| Cordal SAM only, n (%) | 402 (100) | 195 (100) | <0.001 | ||
| Resting LVOT gradient, mm Hg | 35±34 | 8±9 | 44±22 | 63±32 | <0.001 |
| Resting LVOT gradient ≥30 mm Hg, n (%) | 405 (37) | 0 | 279 (69) | 126 (65) | <0.001 |
| Maximal LVOT gradient, mm Hg | 49±31 | 9±8 | 82±43 | 87±14 | <0.001 |
| Maximal LVOT gradient ≥30 mm Hg, n (%) | 597 (54) | 0 | 402 (100) | 195 (100) | <0.001 |
| Maximal LVOT gradient ≥50 mm Hg, n (%) | 496 (45) | 0 | 301 (100) | 195 (100) | <0.001 |
| Right ventricular systolic pressure, mm Hg | 36±14 | 35±13 | 35±15 | 38±17 | 0.01 |
| Late gadolinium enhancement on cardiovascular magnetic resonance, n (%) | 100/194 (52) | 31/58 (53) | 25/53 (47) | 44/83 (53) | <0.01 |
LV indicates left ventricular; LVOT, left ventricular outflow tract; and SAM, systolic anterior motion.