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. 2020 Jul 1;106(23):1853–1861. doi: 10.1136/heartjnl-2019-314702

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© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution 4.0 Unported (CC BY 4.0) license, which permits others to copy, redistribute, remix, transform and build upon this work for any purpose, provided the original work is properly cited, a link to the licence is given, and indication of whether changes were made. See: https://creativecommons.org/licenses/by/4.0/.

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Risk tools modified WHO (mWHO), CARdiac disease in PREGnancy (CARPREG), Zwangerschap bij Aangeboren HARtAfwijking (ZAHARA), Registry Of Pregnancy And Cardiac disease (ROPAC). OR’s and rates are derived from cohorts consisting of approx. 60% patients congenital heart disease (63% in CARPREG II and 58% in ROPAC). Numbers derived from: Silversides et al, JACC, 2018; Drenthen et al, Eur Heart J, 2010; van Hagen et al, Eur J Heart Fail. NYHA, New York Heart Association functional class. OR, Odds Ratio