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
Measurements

Site

Z-Score

Range

Z-Score:  
Range:  

Z-Score:  
Range:  

Z-Score:  
Range:  

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.

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.