Using the flush technique, determinations of blood pressure were made on 294 normal infants from 1 day to 1 year of age and on 23 additional infants and older children with congenital heart disease. Analysis of the data showed that: The method was found to be a practical and relatively accurate procedure in the office or clinic. The pressure at the ankle was usually significantly lower than that at the wrist. Comparative studies with auscultatory and direct measurements indicated that values obtained by the flush technique represent the mean rather than the systolic blood pressure. Readings obtained with a 5 cm blood pressure cuff did not differ significantly from those obtained with a 7.0 cm or 9.5 cm cuff.