Flared prosthetic cardiac valve delivery devices and systems

A device for treating a diseased native valve in a patient, the device comprising:

• a frame structure comprising a central annular portion, an inflow portion, and an outflow portion, wherein the outflow portion is flared radially outwards relative to the central annular portion;
• a valve segment positioned radially within the frame structure, the valve segment comprising a plurality of leaflets;
• and
• a plurality of commissure attachment mechanisms coupling the leaflets to the outflow portion of the frame structure, each commissure attachment mechanism extending radially inwards such that an inner circumference formed by the commissure attachment mechanisms is approximately equal to an inner circumference of the central annular portion.