Table 3.
Conventional and two-dimensional speckle tracking echocardiographic data
BL | PL | BL Before VL | VL | MIL | |
---|---|---|---|---|---|
LV inner diameter at end diastole, mm | 28 ± 2 | 30 ± 1* | 29 ± 2 | 30 ± 2 | 30 ± 1 |
LV inner diameter at end systole, mm | 22 ± 2 | 24 ± 1 | 21 ± 2 | 19 ± 3 | 16 ± 2 |
Ejection fraction, % | 51 ± 8 | 50 ± 7 | 58 ± 6 | 72 ± 5 | 82 ± 6‡ |
Fractional shortening, % | 22 ± 4 | 21 ± 4 | 26 ± 4 | 35 ± 4 | 45 ± 5‡ |
E wave velocity, cm/s | 54 ± 8 | 47 ± 13 | 54 ± 9 | 78 ± 10† | 94 ± 11‡ |
A wave velocity, cm/s | 42 ± 8 | 44 ± 7 | 43 ± 5 | 55 ± 18 | 65 ± 19‡ |
E/A | 1.4 ± 0.3 | 1.1 ± 0.4* | 1.3 ± 0.2 | 1.5 ± 0.3 | 1.5 ± 0.3 |
E wave deceleration time, ms | 81 ± 22 | 67 ± 11 | 89 ± 8 | 76 ± 16 | 82 ± 13 |
s′, cm/s | 5.2 ± 1.8 | 4.6 ± 1.0 | 6.1 ± 1.8 | 7.8 ± 2.3 | 12.3 ± 4.1‡ |
Myocardial velocity during early diastole, cm/s | 6.1 ± 1.4 | 4.3 ± 1.3* | 6.1 ± 1.3 | 10.3 ± 1.7† | 10.9 ± 2.6 |
Isovolumic relaxation time, ms | 45 ± 15 | 70 ± 17 | 55 ± 13 | 39 ± 15 | 44 ± 22 |
Radial strain, % | 23 ± 5 | 17 ± 3* | 22 ± 4 | 35 ± 5† | 43 ± 12 |
Global circumferential strain, % | 13 ± 3 | 9 ± 3* | 12 ± 2 | 16 ± 2† | 21 ± 4‡ |
Global longitudinal strain, % | 12 ± 3 | 11 ± 2 | 13 ± 3 | 14 ± 3 | 14 ± 3 |
Longitudinal strain rate at early diastole, 1/s | 1.3 ± 0.4 | 1.0 ± 0.3 | 1.5 ± 0.3 | 1.8 ± 0.4 | 1.9 ± 0.6‡ |
LV twist, ° | 3.1 ± 1.7 | 1.8 ± 1.3* | 3.1 ± 1.8 | 4.4 ± 1.3 | 5.7 ± 2.0‡ |
Values are means ± SE. Only left ventricular (LV) twist showed same changes as the time constant under various loading conditions. Longitudinal strain rate at early diastole and global longitudinal strain (GLS) did not showed significant change under pressure loading (PL) compared with baseline (BL). VL, volume loading; MIL, milrinone administration.
P < 0.05 compared with BL;
P < 0.05 compared with BL before VL;
P < 0.05 compared with VL.