Abstract
AKIBA, T., YOSHIKAWA, M., OTAKI, S., KOBAYASHI, Y., NAKASATO, M., SUZUKI, H. and SATO, T. Echocardiographic Measurements of Left Ventricle in Normal Infants and Children. Tohoku J. exp. Med., 1986, 149 (1), 31-37-Echocardiographic studies were performed on 110 normal infants and children ranging in age from 2 days to 15 years. The following parameters of the left ventricle were measured: left ventricular end-diastolic and end-systolic diameters (LVEDd and LVESd), shortening fraction (LVSF), end-diastolic volume (LVEDV), ejection fraction (LVEF), posterior wall thickness in end-diastole (LVPWED) and end-systole (LVPWES), mass (LVM), LVEDd/LVPWED, LVESd/LVPWES and mean velocity of circumferential fiber shortening (LV mean Vcf). Each parameter was compared with body surface area (BSA). LVEDd, LVESd, LVEDV, LVPWED, LVPWES and LVM were expressed as a function of body surface area with exponential equations: LVEDd=41.4 (BSA)0.49mm, LVESd=28.1 (BSA)0.49mm, LVEDV=74.1 (BSA)1.48ml, LVPWED=4.4 (BSA)0.45mm, LVPWES=9.2 (BSA)0.44mm and LVM=46.4 (BSA)1.48g. LVSF, LVEDd/ LVPWED, LVESd/LVPWES and LV mean Vcf were independent of body surface area: LVSF averaged 32±1 (mean±standard error of the mean)%, LVEF 68±1%, LVEDd/LVPWED 10.0±0.2, LVESd/LVPWES 3.1±0.1 and LV mean Vcf 1.08±0.02circ/sec. Thus, normal values of these parameters can be applied to estimate them in pediatric patients with heart diseases.
