Saturday, December 8, 2007


Users of the Pediatric Cardiac Valve Z-Score calculator might be interested to know about an erratum to the reference article:

The tricuspid valve nomograms have been re-published.

In the process of refining the calculator on, it was noted that tricuspid valve z-scores calculated by the supplied formula differed considerably from the result when using the nomogram. I contacted the lead author, he contacted their statistician, and it was discovered that the original nomograms were in error.

Fortunately, the error involved only the nomograms themselves- the formulae are (still) correct and thus, none of our calculations were affected.