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Lancellotti et al., Recommendations for the echocardiographic assessment of native valvular regurgitation: an executive summary from the European Association of Cardiovascular Imaging – European Heart Journal – Cardiovascular Imaging (2013) 14, 611–644 https://doi.org/10.1093/ehjci/jet105 Vahanian et al. 2021 ESC/EACTS Guidelines for the management of valvular heart disease: Developed by the Task Force for the management of valvular heart disease of the European Society of Cardiology (ESC) a nd the