Abstract
The combination of pulsed Doppler and M-mode echocardiography can provide estimates of blood flow velocity and diameter of the ascending aorta, from which cardiac output can be calculated. Since the square of the aortic root diameter (ARD) is used in the calculation of cardiac output, precise measurements are vital. This study assessed normal values for ARD, obtained by M-mode echocardiography with leading edge methodology in early diastole. 172 preterm and 228 term newborn infants (BW 750-4,740 g, GA 25-43 w) were studied during the first week of life. ARD increased linearly with advancing birthweight (r=0.93, p<0.001) and gestational age (r=0.90, p<0.001).
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Walther, F., Siassi, B., King, J. et al. 151 NORMAL VALUES OF AORTIC ROOT DIAMETER IN NEONATES. Pediatr Res 19, 136 (1985). https://doi.org/10.1203/00006450-198504000-00181
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DOI: https://doi.org/10.1203/00006450-198504000-00181