A stent frame including an annular portion having first and second ends, a central longitudinal axis, and a wire portion with at least two extending posts and a generally sinusoidal series of peaks and valleys between each of the at least two extending posts; an atrial portion extending from the first end of the annular portion, wherein the atrial portion includes a plurality of flares that extend radially outward relative to the longitudinal axis of the annular portion; and a ventricular portion extending from the second end of the annular portion, wherein the ventricular portion includes at least one flare that extends radially outward relative to the longitudinal axis of the annular portion.