title: Longitudinal motion of the atrioventricular annuli in children: reference values, growth related changes, and effects of right ventricular volume and pressure overload.
abstract: The goals of this study were to characterize normal patterns of longitudinal motion of atrioventricular annuli in the young, establish reference values and assess growth-related changes (n = 40). Sensitivity to changes in right ventricular volume and pressure load was assessed in patients with atrial septal defect (ASD) (n = 25) and with primary pulmonary hypertension (PPH) (n = 20). M-mode of the annuli were obtained from apical views. In healthy subjects, longitudinal %displacement decreased with growth, lateral tricuspid annulus had highest %displacement, velocity of annular descent did not change with growth, tricuspid lateral annulus had the highest velocity of descent, only ascent velocity of the lateral tricuspid annulus decreased with growth, velocities of ascent for the lateral annuli were similar and higher than the septum, and heart rate had no effect on parameters tested. In patients with ASD, the findings were an exaggerated normal pattern. In patients with PPH, %displacement and ascent velocities were blunted. Our results demonstrate the utility of this technique to assess annular dynamics in pediatric patients.
authors.affiliation: University of Colorado Health Sciences Center, The Children's Hospital, 1056 E 19th Avenue, Denver, CO 80218, USA.
authors.forename: Orlando X
authors.initials: OX
authors.lastname: Arce
authors.forename: Ole A
authors.initials: OA
authors.lastname: Knudson
authors.forename: Misoo C
authors.initials: MC
authors.lastname: Ellison
authors.forename: Patricia
authors.initials: P
authors.lastname: Baselga
authors.forename: D Dunbar
authors.initials: DD
authors.lastname: Ivy
authors.forename: Curt
authors.initials: C
authors.lastname: Degroff
authors.forename: Lilliam
authors.initials: L
authors.lastname: Valdes-Cruz
mesh_terms: D000293:Adolescent; D000328:Adult; D001783:Blood Flow Velocity; D002648:Child; D002675:Child, Preschool; D015150:Echocardiography, Doppler; D006339:Heart Rate; D006344:Heart Septal Defects, Atrial / Q000000981:diagnostic imaging* / Q000503:physiopathology; D006352:Heart Ventricles / Q000033:anatomy & histology / Q000503:physiopathology; D006801:Humans; D006976:Hypertension, Pulmonary / Q000000981:diagnostic imaging* / Q000503:physiopathology; D016014:Linear Models; D008943:Mitral Valve / Q000000981:diagnostic imaging / Q000502:physiology*; D015588:Observer Variation; D012016:Reference Values; D015203:Reproducibility of Results; D014261:Tricuspid Valve / Q000000981:diagnostic imaging / Q000502:physiology*; D016276:Ventricular Function; D016278:Ventricular Function, Right / Q000502:physiology*; D017725:Ventricular Pressure