CHSS Score for neonatal critical aortic stenosis


for neonatal critical aortic stenosis


Data Collection

Weight (Kg):
Height (cm):
CHSS Score:


CHSS Score Explanation:

The score is the predicted difference in 5-year survival for a UVR minus a BVR. A positive number favors a BVR; a negative number favors a UVR, with the magnitude of the difference expressed by the number.

For example, a CHSS Score of +10 predicts that 5-year survival is 10% greater for a BVR versus a UVR. A score of -20 predicts that 5-year survival after a UVR is 20% greater than after a BVR.

“ Please note, the CHSS on-line AS Calculator survival predictions were previously reported in decimal points rather than % survival.  The calculator has now been changed to % Survival.  We apologize for any confusion this inadvertent error has caused.”



Hickey EJ, Caldarone CA, Blackstone EH, et al Critical left ventricular outflow obstruction: The disproportionate impact of biventricular repair in borderline cases. JTCVS 2007;134:1429-36