title: Doppler-derived mean aortic flow velocity in children: an alternative to cardiac index.
abstract: This study tested the hypothesis that mean aortic velocity is relatively constant in children. Eighty-eight normal children (aged 1 month to 15 years) were studied prospectively. Ascending aortic flow velocities were obtained by pulse Doppler and mean aortic velocities calculated. Mean aortic flow velocity was relatively constant for all ages at 28.4 +/- 4.8 cm/s. As Doppler is easy to perform, mean aortic flow velocity may be an alternative approach to the assessment of cardiac output.
authors.affiliation: Department of Paediatrics, University of British Columbia, British Columbia's Children's Hospital, Vancouver, Canada.
authors.forename: M D
authors.initials: MD
authors.lastname: Seear
authors.forename: L
authors.initials: L
authors.lastname: D'Orsogna
authors.forename: G G
authors.initials: GG
authors.lastname: Sandor
authors.forename: E
authors.initials: E
authors.lastname: de Souza
authors.forename: R
authors.initials: R
authors.lastname: Popov
mesh_terms: D000293:Adolescent; D000367:Age Factors; D001011:Aorta / Q000033:anatomy & histology* / Q000254:growth & development; D001783:Blood Flow Velocity; D001809:Blood Viscosity; D001830:Body Surface Area; D002302:Cardiac Output; D002648:Child; D002675:Child, Preschool; D004452:Echocardiography; D006801:Humans; D007223:Infant; D011446:Prospective Studies; D012016:Reference Values; D014655:Vascular Resistance