Method and apparatus for mitral valve chord repair

A anchor assembly delivery system, comprising:

• a delivery catheter having an inner diameter;
• a sheath, having a proximal end, a distal end and a central lumen, the sheath configured to be slidingly received within the delivery catheter;
• an anchor delivery sheath coupled to the distal end of the sheath configured to transition in diameter from an expanded diameter to an unexpanded diameter when withdrawn into the delivery catheter, the anchor delivery sheath having a side wall defining a cavity, wherein the expanded diameter is larger than the inner diameter of the delivery catheter;
• an anchor assembly removably positioned within the cavity, the anchor assembly comprising a hub and a helical tissue anchor;
• and
• at least one radially extending first engagement element on the side wall and exposed to the cavity for engaging the helical tissue anchor,
• wherein rotation of the helical tissue anchor relative to the anchor delivery sheath is operable to advance the anchor assembly distally out of the cavity.