Home › Congenital & Pediatric Heart Disease Scores › Z-Score Left Ventricular (LV) Dimension Calculator

Z-Score Left Ventricular (LV) Dimension Calculator

  • LV End-Diastolic Dimension (mm)
  • Body Surface Area (BSA, m²)
  • Z-Score for Left Ventricular End-Diastolic Dimension (LVEDD): Explanation and Clinical Context
    Z-Score LVEDD provides a standardized method to assess left ventricular size relative to body size. It is calculated as the difference between the measured LVEDD and the predicted LVEDD (adjusted for body surface area), divided by the standard deviation from reference data.
    This score allows clinicians to identify abnormal LV enlargement or reduction that may not be apparent from absolute measurements alone. A Z-score between -2 and +2 is typically considered within normal limits.
    Clinical application includes assessment in congenital heart disease, hypertrophic cardiomyopathy, or monitoring ventricular remodeling in adults.

    Reference:
    de Simone G, et al. "Left ventricular mass and body size in normotensive children and adults: assessment of allometric relations and impact of overweight." J Am Coll Cardiol. 1992;20:1251-1260. doi:10.1016/0735-1097(92)90370-E