Dallaire et al., JASE 2016

BSA-adjusted z-scores for longitudinal and circumferential strain for pediatric patients.

These Z scores will help reduce the confounding effect of body size in strain measurements, which should ease their clinical interpretation in pediatric echocardiography.

Note: Because of poor reproducibility and vendor-specific effects, the authors elected to exclude radial strain measurements from this study.

Also note:

To compute Z score equations that would yield intuitively lower Z scores for measurements closer to zero, we used the absolute value of strain measurements with negative values.

Patient Demographics

Height (cm):

Weight (kg):

BSA ("Haycock"):

Measurements

Site

Z-Score

Range

Mean Longitudinal Strain (%):

Z-Score:

Range:

Basal Mean Circumferential Strain (%):

Z-Score:

Range:

Mid Mean Circumferential Strain (%):

Z-Score:

Range:

Apical Mean Circumferential Strain (%):

Z-Score:

Range:

Note: the study population had the following characteristics:

BSA range: (0.43 - 2.2)
age range: (1.3 - 18y)

Data entered for patients outside of these limits should be used with caution.

Pediatric Reference Values and Z Score Equations for Left Ventricular Systolic Strain Measured by Two-Dimensional Speckle-Tracking Echocardiography.

Dallaire F, Slorach C, Bradley T, Hui W, Sarkola T, Friedberg MK, Jaeggi E, Dragulescu A, Mahmud FH, Daneman D, Mertens L.

J Am Soc Echocardiogr. 2016 May 13.