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Fetal echocardiography is routinely performed to screen for right or left ventricular hypoplasia, mitral stenosis, aortic stenosis, and pulmonary stenosis or atresia. Use this calculator to generate z-scores for fetal cardiac dimensions- including the mitral valve, left ventricle, aortic valve, and ascending aorta. Based upon work from the Royal Brompton Hospital, UK.
|Left Heart (cm)|
|Right Heart (cm)|
|Isthmus & Duct (mm)|
ReferencesDevelopment of Z-scores for fetal cardiac dimensions from echocardiography. Schneider C, McCrindle BW, Carvalho JS, Hornberger LK, McCarthy KP, Daubeney PE. Ultrasound Obstet Gynecol. 2005 Nov;26(6):599-605. Z-scores of the fetal aortic isthmus and duct: an aid to assessing arch hypoplasia. Pasquini L, Mellander M, Seale A, Matsui H, Roughton M, Ho SY, Gardiner HM. Ultrasound Obstet Gynecol. 2007 Jun;29(6):628-33.
This is so much better than looking up on a chart. Thanks for the service.
Thanks a lot! It is convenient to use and very useful.
Superb, Thank you very much to make it available
it would be good to have Z scores for interventricular septal thickness. this 25 weeker's IVS measured 2.9mm, qualitatively it looks hypertrophic. I would consider 4mm hypertrophic close to term. thanks for your wonderful work !!!! R Dillenburg, Ped cardiologist, Canada
Rejane : Thanks for the kind words. Z-scores for fetal ventricular wall thickness' would indeed be good... The AJC article by Firpo et al. is probably the closest I have found to providing this information, but they do not explicitly say that their data could be used for z-score calculations. They published the regression equations for the means, and SEE's. The Standard Error of the Estimate does not have the same statistical definition as the Standard Deviation, and my limited understanding of statistics prevents me from using them interchangeably for the purpose of calculating z-scores.
Nice job. A huge contribution. Call on me if you need help. Jim
Thanks Dr. Huhta- I might just do that (call on you).
Thanks for all the effort you've put into making these available. Look forward to the day when everyone uses the data...
Are there z-scores available for fetal aortic root dimensions at the level of the sinuses? Thanks
Dr. Romano: I am unaware of any such reference...