Tissue anchoring device

1. A tissue anchoring device comprising an expandable frame having a proximal end and a distal end and at least one anchor having a tissue penetrating portion attached to said expandable frame through a support frame including a first beam and at least one second beam being indirectly attached to said expandable frame, said at least one anchor is capable of elastically bending with respect to a longitudinal axis of said expandable frame through torsion of said first beam and bending of said at least one second beam of said support frame, wherein said tissue penetrating portion includes two tissue-penetrating prongs and a restraining element for restraining said two tissue-penetrating prongs in a parallel configuration for co-delivery into a tissue and for releasing said two tissue-penetrating prongs to splay out away from each other following penetration through said tissue and resulting backward movement of said restraining element along said two tissue-penetrating prongs.

2. The device of claim 1 , wherein said support frame is shaped as a pentagon.

3. The device of claim 1 , wherein said tissue penetrating portion of said at least one anchor is pointed at an angle of 45-70 degrees with respect to a longitudinal axis of said expandable frame.

4. The device of claim 3 , wherein said at least one anchor can be elastically bent from a first direction in which said tissue penetrating portion points at said angle to a second direction in which said tissue penetrating portion is generally pointing parallel to said longitudinal axis of said frame.

5. The device of claim 1 , wherein said restraining element is a restraining sleeve.

6. The device of claim 5 , wherein said tissue penetrating portion includes a stop for preventing movement of said restraining sleeve over a tissue penetrating tip of said tissue penetrating portion.