Keywords: Aortic regurgitation; Aortic stenosis; European Association for Cardio-Thoracic Surgery (EACTS); European Society of Cardiology (ESC); Guidelines; Heart surgery; Mitral regurgitation; Mitral stenosis; Multivalvular disease; SAVR; TAVI; Transcatheter edge-to-edge repair; Transcatheter valve replacement; Tricuspid regurgitation; Tricuspid stenosis; Valvular heart disease.