"z-scores have ... become invaluable for tracking longitudinal changes of growth for individual patients and for comparing changes in growth of cardiac structures for different fetal populations."
This site represents my effort to collect and adapt some of the most recent data as it pertains to calculating z-scores for fetal echocardiography. This site hopefully improves on my previous attempts to do the same. You can now:
The included references were selected because they:
While I call this a web app, I mostly mean that it is a web site that is useful on a wide variety of devices and screen sizes—it is not a native app that you can download.
According to the American Society of Echo's Recommendations for Quantification Methods During the Performance of a Pediatric Echocardiogram:
When normative data are available, the measurements of cardiovascular structures should be expressed as Z scores
A z-score indicates:
how many standard deviations an observation is above or below the mean. It allows comparison of observations from different normal distributions, which is done frequently in research.
(See the Wikipedia entryfor more information about z-scores.)
Concerning the application of z-scores to pediatric cardiology, interested persons should read:
My name is Dan Dyar.
Among many other things, I am a Pediatric Cardiac Sonographer. Having worked in this field since Before The Internet, I sometimes observe the collision of technology and information in this field and am astonished by the disparity: we are simultaneously incredibly advanced and desperately primitive.
I hope this website helps soften these collision.
Fill out the form here and I'll get back to you as soon as I can.
While I mostly do this as a hobby, and I try to operate within the "free tier" of App Engine and Amazon Web Services, that is not to say that this is an entirely expense-free occupation.
If you would like to help support the development of this and other projects, please consider making a donation to my PayPal account:
10 Feb 2019: v.0.35
14 Jan 2019: v.0.34
03 Sep 2017: v.0.33
25 Nov 2016: v.0.32
13 Mar 2016: v.0.31
27 Dec 2015: v.0.3
28 Mar 2012: v.0.2.5
24 Mar 2012: v.0.2.4
24 Mar 2012: v.0.2.3
23 Mar 2012: v.0.2.2
23 Mar 2012: v.0.2.1
22 Mar 2012: v.0.2
21 Mar 2012: v.0.1