Mitral Heart Valve Replacement

Abstract

A prosthetic heart valve having an inflow end, an outflow end and a longitudinal axis extending from the inflow end to the outflow end includes a collapsible and expandable stent including a plurality of cells arranged in at least one row extending around a circumference of the stent. The stent further includes at least one engaging arm joined to one of the cells adjacent the outflow end and having a free end extending toward the inflow end, the engaging arm being movable between a loaded condition in which the engaging arm is oriented substantially parallel with the longitudinal axis of the stent, a partially-released condition in which the engaging arm forms a first angle with the longitudinal axis of the stent, and a fully-released condition in which the engaging arm forms a second angle with the longitudinal axis of the stent, the first angle being larger than the second angle.

1 . A prosthetic heart valve having an inflow end, an outflow end and a longitudinal axis extending from the inflow end to the outflow end, comprising:
 a collapsible and expandable stent including a plurality of cells arranged in at least one row extending around a circumference of the stent, the stent further including at least one engaging arm joined to one of the cells adjacent the outflow end and having a free end extending toward the inflow end, the engaging arm being movable between a loaded condition in which the engaging arm is oriented substantially parallel with the longitudinal axis of the stent, a partially-released condition in which the engaging arm forms a first angle with the longitudinal axis of the stent, and a fully-released condition in which the engaging arm forms a second angle with the longitudinal axis of the stent, the first angle being larger than the second angle, the one cell having two upper struts joined to one another at an upper apex, two lower struts joined one another at a lower apex, the lower struts being joined to the upper struts at corners, the engaging arm being joined to the lower struts of the one cell and movable between a loaded condition and a relaxed condition, the engaging arm being sloped with respect to a longitudinal axis of the one cell in the relaxed condition;   a collapsible and expandable valve assembly disposed within the stent and having a plurality of leaflets.