Replacement mitral valve, delivery system for replacement mitral valve and methods of use

A transseptal delivery system, comprising:

• a replacement mitral valve having a first end and a second end releasably held within the delivery system in a radially compressed configuration;
• a first tubular restraining shaft sized for radially restraining the replacement mitral valve in the radially compressed configuration;
• a second tubular restraining shaft within the first tubular restraining shaft sized for radially restraining the replacement mitral valve in the radially compressed configuration, wherein the first and second tubular restraining shafts are adapted to sequentially release the first end of the replacement mitral valve followed by the second end of the replacement mitral valve;
• an inner shaft located within second tubular restraining shaft, the inner shaft having a retention member disposed along a distal end portion thereof, the retention member shaped to releasably engage portions of the replacement mitral valve;
• and
• a spring located within a tubular distal section of the second tubular restraining shaft, wherein a proximal end of the spring is attached to the second tubular restraining shaft, and wherein a distal end of the spring is attached to a cover configured to at least partially surround the retention member, wherein the spring applies a distal force on the cover in order to prevent inadvertent release of the replacement mitral valve from the retention member during bending of the transseptal delivery system.