Normal aortic root dimensions in premature infants

Abstract
Normal aortic root dimensions are established using 334 sequential echocardiograms in 111 average‐for‐gestational‐age premature infants between 600‐2500 g. The aortic roots increased in diameter from 0.53 cm ± 0.04 cm for infants weighing 600–900 g to 0.80 ± 0.08 cm for infants weighing between 2200–2500 g.