Table 2 Left ventricle standard echo and 2D speckle tracking echo measurements at rest and peak effort
Variable | OSA | Controls | P-value |
|---|---|---|---|
(n = 55) | (n = 35) | ||
Resting measurements | |||
SpO2 (%) | 94.7 ± 16.2 | 98 ± 1.6 | < 0.01 |
IVSd (mm) | 11.4 ± 1.8 | 9.1 ± 2.3 | < 0.01 |
PWd (mm) | 10.4 ± 1.6 | 8.7 ± 2.1 | < 0.01 |
LVEDD (mm) | 48.3 ± 3.9 | 47.2 ± 4.4 | NS |
LVESD (mm) | 34.3 ± 3.6 | 32.4 ± 4.1 | NS |
LV mass index (g/m2) | 52.8 ± 5.3 | 48.1 ± 3.4 | < 0.01 |
Biplane LVEF (%) | 56.5 ± 6.2 | 57.4 ± 5.5 | NS |
LV GLS (%) | −13.4 ± 3.8 | −18.4 ± 3.3 | < 0.001 |
Mitral E velocity (cm/s) | 0.9 ± 0.3 | 0.8 ± 0.4 | NS |
Mitral A velocity (cm/s) | 0.7 ± 0.4 | 0.9 ± 0.3 | NS |
E/A ratio | 1.2 ± 0.4 | 0.9 ± 0.4 | < 0.01 |
Mitral septal e’ velocity (cm/s) | 0.13 ± 0.02 | 0.16 ± 0.05 | < 0.01 |
Mitrallateral e’ velocity (cm/s) | 0.14 ± 0.03 | 0.17 ± 0.03 | < 0.01 |
E/e’ ratio | 8.2 ± 3.1 | 5.9 ± 2.8 | < 0.01 |
LAVI (ml/m2) | 32.4 ± 4.4 | 28.3 ± 5.1 | < 0.01 |
sPAP (mmHg) | 31.5 ± 7.8 | 21.3 ± 2.9 | < 0.01 |
TAPSE (mm) | 22.5 ± 3.3 | 24.5 ± 3.8 | NS |
Tricuspid S′ velocity (cm/s) | 13.3 ± 2.2 | 14.4 ± 3.1 | NS |
Peak effort measurements | |||
SpO2 (%) | 92.3 ± 3.2 | 97.2 ± 2.6 | < 0.01 |
Exercise capacity (Watt) | 115.3 ± 25 | 150.4 ± 35 | < 0.001 |
Biplane LVEF (%) | 62.3 ± 5.8 | 65.7 ± 6.8 | NS |
LV GLS (%) | −15.8 ± 2.6 | −23.4 ± 4.3 | < 0.001 |
Mitral E velocity (cm/s) | 1.1 ± 0.5 | 1.2 ± 0.6 | NS |
Mitral A velocity (cm/s) | 0.9 ± 0.4 | 0.9 ± 0.3 | NS |
E/A ratio | 1.2 ± 0.4 | 1.3 ± 0.5 | < 0.01 |
Mitral septal e’ velocity (cm/s) | 0.08 ± 0.02 | 0.18 ± 0.05 | < 0.0001 |
Mitral lateral e’ velocity (cm/s) | 0.07 ± 0.03 | 0.19 ± 0.03 | < 0.0001 |
E/e’ ratio | 15.4 ± 4.1 | 7.4 ± 2.8 | < 0.0001 |
sPAP (mmHg) | 45.5 ± 5.8 | 28.4 ± 4.2 | < 0.001 |
TAPSE (mm) | 26.4 ± 2.3 | 27.5 ± 5.8 | NS |
Tricuspid s’ velocity (cm/s) | 16.4 ± 3.1 | 17.7 ± 4.1 | NS |