Trileaflet mechanical prosthetic heart valve

A trileaflet mechanical prosthetic heart valve comprising:

• a ring including three or more protrusions located along an inner circumference of the ring;
• three or more hinges attached to the ring, the three or more hinges evenly spaced from one another along the inner circumference of the ring;
• and
• three or more leaflets, each leaflet attached to one of the three or more hinges, each leaflet attached to a hinge by an opening located in a center of a lower portion of the leaflet, each leaflet including:
• a front surface having a concave shape in a transverse axis and a flat shape in a longitudinal axis,
• a rear surface having a convex shape in the transverse axis and a flat shape in the longitudinal axis, the rear surface of the leaflets configured to be in contact with the protrusions of the ring when the leaflets are in an open position such that there is an arc shaped gap formed between the rear surface of the leaflets and the inner circumference of the ring when the leaflets are in the open position, wherein the the rear surface of the leaflets substantially tracks the inner circumference of the ring when the leaflets are in the open position;
• and
• flat regions on left and right sides of the front surface of the leaflets, the flat regions for improved fluid dynamics.