Table 2.
Exercise Echocardiography
| Variables | Non- Obstructive |
Labile- Obstructive |
Obstructive | Total | p-value | |
|---|---|---|---|---|---|---|
| Max wall thickness (cm) | 2.0±0.5 | 2.0±0.5 | 2.2±0.5 | 2.1±0.5 | 0.1 | |
| Left atrium (cm) | 4.0±0.7 | 4.1±0.7 | 4.5±0.7 | 4.2±0.7 | <0.001 | |
| Ejection fraction (%) | 63±10 | 64±8 | 65±9 | 64±9 | 0.2 | |
| E/A | 1.4±0.8 | 1.3±0.5 | 1.3±0.7 | 1.3±0.6 | 0.4 | |
| E/e' | 16±9 | 17±9 | 24±13 | 19±11 | <0.001 | |
| Left ventricular outflow tract gradient at rest (mmHg) | 8±4 | 15±7 | 58±25 | 25±26 | <0.001 | |
| Left ventricular outflow tract gradient at stress (mmHg) | 18±6 | 69±42 | 111±40 | 64±50 | <0.001 | |
| Systolic anterior motion of mitral valve | no | 41 (43%) | 31 (27%) | 2 (2%) | 74 (25%) | <0.001 |
| incomplete | 54 (57%) | 68 (60%) | 44 (53%) | 166 (57%) | ||
| complete | 0 (0%) | 15 (13%) | 37 (45%) | 52 (18%) | ||
| Exercise time (seconds) | 552±195 | 573±224 | 486±184 | 545±206 | 0.04 | |
| Exercise capacity (METs) | 10.7±3.6 | 10.6±4.4 | 8.0±3.5 | 9.9±4.1 | <0.001 | |
| Heart rate at rest (beats/min) | 66±13 | 63±14 | 65±12 | 65±13 | 0.2 | |
| Systolic blood pressure at rest (mmHg) | 128±19 | 134±17 | 131±18 | 131±18 | 0.05 | |
| Diastolic blood pressure at rest (mmHg) | 77±12 | 78±11 | 74±11 | 76±11 | 0.05 | |
| Heart rate at stress (beats/min) | 147±27 | 147±28 | 135±26 | 143±27 | 0.004 | |
| Systolic blood pressure at stress (mmHg) | 166±30 | 167±34 | 147±34 | 161±34 | <0.001 | |
| Diastolic blood pressure at stress (mmHg) | 82±17 | 84±17 | 75±17 | 81±18 | 0.002 | |
| Age-predicted heart rate (%) | 86.1±14.5 | 86.7±14.3 | 81.2±14.1 | 84.9±14.5 | 0.02 | |