Table 20-2.
Echocardiographic Values in Clinically Normal Rabbitsa
| Parameter | Dutch Belted Rabbits36 (n = 6) | Japanese White Rabbits50 (n = 4) | New Zealand White Rabbits54 (n = 20) | New Zealand White Rabbits13 (n = 26) |
|---|---|---|---|---|
| Body weight (kg) | 2.32 ± 0.36 | 3.0 (mean) | 2.92 (mean) | 2.3 ± 0.4 |
| Age (months) | 7 (mean) | >13 | 4 | 4-5 |
| LVEDD (cm) | 1.17 ± 0.19 | 1.69 ± 0.05 | 1.54 ± 0.112 | 1.351 ± 0.105 |
| LVESD (cm) | 0.70 ± 0.09 | 1.15 ± 0.05 | 1.009 ±0.091 | 0.864 ± 0.082 |
| %FS | 39.50 ± 5.39 | — | 34.5 ± 4.9 | 36.01 ± 4.31 |
| IVSD (cm) | 0.25 ± 0.05 | 0.33 ± 0.03 | 0.217 ± 0.056 | 0.265 ± 0.031 |
| LVPWD (cm) | 0.31 ± 0.08 | 0.33 ± 0.03 | 0.274 ± 0.041 | 0.225 ± 0.029 |
| LA (cm) | — | 1.05 ± 0.25 | — | 0.749 ± 0.114 |
| Ao (cm) | 0.67 ± 0.10 | 1.07 ± 0.12 | — | 0.657 ± 0.046 |
| LA/Ao | 1.38 ± 0.32 | — | — | 1.15 ± 0.19 |
| RADs (cm) | 0.61 ± 0.08 | — | — | — |
| RA/Ao | 0.88 ± 0.17 | — | — | — |
| EPSS (cm) | 0.05 ± 0.05 | — | — | 0.141 ± 0.025 |
| MVEFS (mm/s) | 70.17 ± 31.82 | — | — | — |
| RVOT velocity (m/s) | 0.83 ± 0.10 | — | — | 0.78 ± 0.12 |
| LVOT velocity (m/s) | 0.65 ± 0.14 | — | 0.749 ± 0.195 | 0.86 ± 0.12 |
| LVET (s) | 0.08 ± 0.01 | — | 0.126 ± 0.014 | 0.096 ± 0.010 |
| VCF (circumference/s) | 4.74 ± 0.45 | — | — | — |
| MV E (m/s) | — | 0.44 ± 0.12 | 0.715 ± 0.138 | 0.78 ± 0.15 |
| MV A (m/s) | — | 0.46 ± 0.17 | 0.514 ± 0.145 | 0.55 ± 0.11 |
| MV E/A | — | 1.0 ± 0.2 | 1.44 ± 0.28 | 1.44 ± 0.16 |
| MV DT (m/s) | — | 41.3 ± 2.5 | — | — |
| TDI E LW (m/s) | — | — | 0.067 ± 0.019 | 0.16 ± 0.05 |
| TDI A LW (m/s) | — | — | 0.039 ± 0.007 | 0.09 ± 0.03 |
Ao, aorta; EPSS, E point to septal separation; IVSD, intraventricular septal thickness at end-diastole; IVSS, intraventricular septal thickness at end-systole; LA, left atrium; LA/Ao, left atrium-to-aorta ratio; LVEDD, left ventricular end-diastolic dimension; LVESD, LV end-systolic dimension; LVET, left ventricular ejection time; LVOT, left ventricular outflow tract; LVPWD, LV posterior wall thickness at end-diastole; MV A, mitral valve A wave; MV E/A, mitral valve E-to-A ratio; MV DT, mitral valve deceleration time; MV E, mitral valve E wave; MVEFS, mitral valve E-F slope; %FS, percent LV fractional shortening; RA/Ao, right atrium-to-aorta ratio; RADs, right atrial dimension in systole; RVOT, right ventricular outflow tract; TDI A LW, tissue Doppler imaging A’ wave from the left ventricular free wall; TDI E LW, tissue Doppler imaging E’ wave from the left ventricular free wall; VCF, velocity of circumferential fiber shortening.
Values are mean ± SD.