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Pediatric Echo Measurements & Z-Scores v1.0

M-mode · Coronaries · 2D structures · Function · evidence-anchored reference ranges · fetal-echo.org

Clinical decision-support only — not a diagnostic tool. Z-scores are calculated from published regression equations and are valid only within the patient weight/BSA range of each reference. Verify all measurements against the original publication before clinical application. For use by qualified clinicians only.

Patient Information

Name and ID are optional — used only to label the printout. Weight and height drive BSA and all Z-score calculations.

Biometric inputs
M-mode — LV dimensions & function Kampmann 2000
All measurements in mm. BSA formula: DuBois & DuBois. Reference: Kampmann C et al. Heart 2000;83:667–72.
LV internal dimensions
LVIDd — LV internal diameter, diastole mm
LVIDs — LV internal diameter, systole mm
IVSd — Interventricular septum, diastole mm
LVPWd — LV posterior wall, diastole mm
IVSs — Interventricular septum, systole mm
LVPWs — LV posterior wall, systole mm
Aortic root & left atrium
Ao — Aortic root mm
LA — Left atrium mm
Derived — calculated automatically
FS% — Fractional shortening (normal ≥ 28%)
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LV Mass — Devereux formula grams
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LV Mass Index g/m² (DuBois BSA)
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LA:Ao ratio
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Coronary Arteries McCrindle 2007 · Dallaire 2011
Measurements in mm. BSA formula: Haycock. Toggle reference set below.
Both fully implemented with verified coefficients (open-source parameterz). Kawasaki classification applies to coronary z-scores.
Main coronary arteries
LMCA — Left main coronary artery mm
LAD — Left anterior descending mm
LCx — Left circumflex mm
RCA — Right coronary artery mm
2D Structures Cantinotti 2014
Measurements in mm. BSA formula: Haycock. Reference: Cantinotti M et al. J Am Soc Echocardiogr 2014;27:179–191. Valid range: age 0–3 years, BSA 0.12–0.67 m².
⚠ Z-score coefficients pending. Enter Cantinotti 2014 Table 3–5 polynomial coefficients into the CANTINOTTI object in the source JavaScript. Measurements are recorded immediately and will appear in the printout.
RV dimensions
RVID basal — RV basal diameter, diastole mm
RVID mid — RV mid-cavity diameter, diastole mm
Aortic root & ascending aorta (2D)
Aortic annulus mm
Aortic sinus — sinus of Valsalva mm
STJ — Sinotubular junction mm
Ascending aorta mm
Pulmonary arteries
MPA — Main pulmonary artery mm
RPA — Right pulmonary artery mm
LPA — Left pulmonary artery mm
AV valve annuli
Mitral valve annulus mm
Tricuspid valve annulus mm
Aortic arch & isthmus
Transverse aortic arch mm
Aortic isthmus mm
Descending aorta (diaphragm level) mm
Outflow tracts & semilunar valve annuli
Pulmonary valve annulus mm · ToF / RVOTO
RVOT — RV outflow tract mm
LVOT — LV outflow tract mm
Function — TAPSE · Strain · EF Normal range guides
Age- and BSA-adjusted z-scores for TAPSE (Koestenberger 2014) are pending coefficient entry. EF and strain thresholds are shown as approximate guides — vendor-specific variation applies.
RV systolic function
TAPSE — Tricuspid annular plane systolic excursion mm
RV S′ — Tissue Doppler, lateral annulus cm/s
LV systolic function
LV EF% — Biplane Simpson %
LV GLS — Global longitudinal strain % · enter negative
RV strain
RV GLS — Global longitudinal strain %
RV FWLS — Free wall longitudinal strain %

Findings & Interpretation

Parameters outside reference ranges are listed here, most abnormal first. |Z| ≥ 2 = abnormal; |Z| 1.5–2 = borderline. Coronary z-scores show Kawasaki classification.

Enter measurements above — out-of-range results will be highlighted here.
Patient name and ID are used only to label this printout on your device. They are never transmitted or stored on any server.

References