Pediatric Left Ventricular End-Diastolic Diameter (LVDd)
Choose the exact original study cohort. These are regression center estimates, not normal intervals, z-scores or diagnostic thresholds.
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Nagasawa uses height only; weight is unused.
Estimated central LVDd
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Equations, age limits and source
Nagasawa
Preterm newborn 0–27 days: LVDd = 0.495 × height(cm) − 5.43 mm. Term infant 0–11 completed months: LVDd = 0.352 × height(cm) + 1.86 mm. Height ≥75 cm is conservatively excluded, but is NOT a verified preterm cohort height cutoff.
Kampmann (ages 1–18 years)
LVDd(mm) = 38.537 × BSA(m²)^0.4509; BSA = 0.007184 × height(cm)^0.725 × weight(kg)^0.425 (Du Bois). Only BSA 0.25–2.00 m² is included, without extrapolation to the source neonatal weight tables.
Hypothetical examples
Preterm 40 cm: 14.4 mm; term infant 60 cm: 23.0 mm; child aged 5 years, 100 cm and 24 kg: LVDd approximately 34.5 mm.
Limitations
Statistical central values are not upper/lower normal boundaries, z-scores or diagnostic thresholds. Cohorts, original measurement methods and clinical applicability require further review. English review, rights clearance and publication approval