RVEDd Z-score Calculator
- RVEDd Z-score: Explanation and Clinical Context
The RVEDd Z-score expresses the deviation of measured right ventricular end-diastolic dimension (in mm) from the predicted mean value, normalized by the standard deviation (SD) of the reference population. A Z-score of 0 means that the measurement equals the population mean; positive values indicate enlargement relative to body size, negative values indicate smaller dimensions. Clinically, an elevated RVEDd Z-score (e.g. > +2) may suggest right ventricular dilation above what is expected for that body size, which may warrant further evaluation in the context of congenital heart disease, pulmonary hypertension, or volume/pressure load. Interpretation should always consider imaging quality, body size, and clinical context.
Reference:
Koestenberger M, Nagel B, Ravekes W, Avian A, et al. Reference values and calculation of z-scores of echocardiographic measurements of the normal pediatric right ventricle. Am J Cardiol. 2014;114:1590-1598. doi:10.1016/j.amjcard.2014.08.028
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