CHSS Score for neonatal critical aortic stenosis


for neonatal critical aortic stenosis

The current iteration of the CHSS Critical Aortic Stenosis has been inactivated pending an updated analysis.

In a recent evaluation of the calculator using a more recent patient cohort from the CHSS Critical Left Heart Obstruction Cohort, we found that the parametric models underlying the calculator significantly underestimated survival in patients with critical aortic stenosis with a biventricular or univentricular repair. Further, we found that management discordant with that suggested by the calculator was no longer associated with mortality. Thus, we have concluded that the calculator does not predict optimal management in contemporary critical aortic stenosis patients.

For more information please consult the recent abstract and presentation from the 2018 American Heart Association Scientific Sessions. Thank you for your interest in the CHSS Data Center!

The abstract can be found here

The presentation can be found here

CHSS Score Explanation:

The score is the predicted difference in 5-year survival for a UVR minus a BVR. A positive number favors a UVR; a negative number favors a BVR, 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 UVR versus a BVR. A score of -20 predicts that 5-year survival after a BVR is 20% greater than after a UVR.

“ 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