Abstract: A novel bileaflet mitral heart valve is provided herein, which in two alternative embodiments may have symmetrical leaflets or assymmetrical leaflets. It has a stent including a circular base and a pair of upstanding struts separating a pair of arcuately shaped, depressed, reliefs, each such relief being bounded by a smooth curve interconnecting the struts to the circular base. A flexible, durable, biocompatible, e.g. a pericardial, covering is secured to the stent and provides two opposed molded, flexible, flappably-movable, valve leaflets secured along the smooth curve defining the upper perimeter of the reliefs.