Reevaluation of Methodology and Normal Values
نویسندگان
چکیده
Left ventricular (LV) volume determinations by the area-length method were reevaluated in postmortem studies of left ventricles ranging from 0.5 to 90 cm3 absolute volume. The regression equation relating known and calculated volumes for calculated volumes <15 cm3 (V' 0.733V) was found to be significantly different from that for calculated volumes >15 cm3 (V'= 0.974V -3.1). From these equations, normal values for cinecardiographic LV end-diastolic volume (LVEDV), LV ejection fraction (LVEF), LV systolic output (LVSO), LV mass (LVM), and left atrial maximal volume (LAMax) were derived from 56 children (19 < 2 years) with normal left ventricles who underwent cardiac catheterization. Values for LVEDV/BSA were significantly less for infants (< 2 years) than for older children (42 10 versus 73 + 11 cm3/m2, P < 0.001). Values for LAMax/BSA were also less for infants than for older children (26 5 versus 38 8 cm3/m2, P < 0.001), and LVEF was significantly increasel for infants (0.68 0.05 versus 0.63 + 0.05, P < 0.01). The values for LVM/BSA (88 12 g/m2) and LVSO/BSA (4.42 + 0.95 liters/min/m2) were not significantly different for infants and older children. Multiple regression equations
منابع مشابه
Left heart volume estimation in infancy and childhood. Reevaluation of methodology and normal values.
Left ventricular (LV) volume determinations by the area-length method were reevaluated in postmortem studies of left ventricles ranging from 0.5 to 90 cm3 absolute volume. The regression equation relating known and calculated volumes for calculated volumes <15 cm3 (V' 0.733V) was found to be significantly different from that for calculated volumes >15 cm3 (V'= 0.974V -3.1). From these equations...
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