“…This shows that, despite the great technological evolution and constant studies, an ideal substitute for the natural valve, either mechanical or biological, providing longevity and low thrombogenicity, is yet to be found [1][2][3][4][5] . Because of that, conservative techniques have been progressively used in patients with valvopathies in a number of centers [2][3][4][5][6] . Thus, the interest in the morphology of cardiac valves, which during the 60's and 70's was limited to the pathological features due to the large number of valvar replacements, was extended.…”