Abstract
Differences in aortic root (Ao) size have been reported among normal adult male (M) and female (F) population. However, there is no data available on such a possibility in children. Thus, we studied 110 M and 90 F, normal school children, 5-14 years of age and with body surface area (BSA) of 0.7 to 1.59 by echocardiography (E). Strip chart E recordings of the Ao with the valve motion inside were obtained in the standard fashion by means of a 2.25 M Hz transducer focused from the 3rd or 4th left intercostal space. Inner Ao diameter was measured in millimeters at the onset of the Q wave of the EKG for several cardiac cycles and averaged. Our results for the mean and 1 standard deviation for the M and F children with different BSA were as follows:In this study there is only statistically significant differences (p = <0.01) in Ao size between M and F children in the group with BSA of 1.00-1.19. This may suggest that the sex differences in the Ao sizes in adult population probably establish in young adulthood than during childhood.
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