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Schematic representation of the effective and geometric height modified from De Kerchove et al. [20]. The effective height is defined as the orthogonal length between the aortic annulus and the middle of the free margin. The geometric height is the distance between the nadir and the middle of the free margin of the leaflet. Abbreviations: eH: effective height; gH: geometrical height; STJ: sinotubular junction; VBR: virtual basal ring.
