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Table 2 Repeatability Index (RepI) of Echocardiographic Parameters in Paediatric Patients According to the Literature, [1822]

From: Repeatability of echocardiographic parameters to evaluate the hemodynamic relevance of patent ductus arteriosus in preterm infants: a prospective observational study

author, year N Gestational age/Postnatal age Birthweight Parameter RepI
Mean (SD)/Median Range Mean (SD)/Median Range   
Groves, 2008 9 28 w 27–30 w 1250 g 910–1900 g diameter Aorta descendens 31 %
VTI Aorta descendens 57 %
Skinner, 1996 26 34 w 26–40 w 2406 g 975–4480 g PDA Vmax sys. 28 %
PDA Vmean 36 %
Hudson, 1990 20 NR 27–43 w NR 2380–4020 g Ao Leading Edge to Leading Edge 10 %
Moorthy, 1990 12 “preterm” NR RI_ACA 20 %
van Dijk, 1996 44 8.4 (4.7) y NR RVPEP 17 %
RVET 57 %
  1. Abbreviations: VTI velocity time integral, PDA patent ductus arteriosus, Ao Diameter Aorta, RI_ACA resistance index in anterior cerebral artery, RVPEP right ventricular preejection period, RVET right ventricular ejection time, w weeks, y years, NR not reported