A heart valve implant, comprising: a balloon spacer assembly, the balloon spacer assembly comprising: a balloon spacer defining a spacer cavity configured to be expanded from a deflated condition to an expanded condition with a filling fluid; and a balloon filling valve disposed within and fluidly coupled to said spacer cavity; characterized by: said balloon filling valve is configured to be fluidly coupled to a source of said filling fluid and to selectively allow the introduction and withdrawal of said fluid into and out of said spacer cavity; wherein said balloon filling valve comprises: a central tube comprising a lumen, an outer wall including a proximal opening and a distal opening there through, the central tube coupled to a proximal and a distal portion of said balloon filling valve such that said spacer cavity is defined around said central tube; a valve sheath disposed around said central tube, the valve sheath configured to resiliently engage an outer surface of said central tube; and a valve wire extending through said proximal opening and comprising a tip, the valve wire configured to selectively seal and unseal said balloon filling valve depending on the location of the tip relative to a distal edge of said valve sheath. a balloon spacer assembly, the balloon spacer assembly comprising: a balloon spacer defining a spacer cavity configured to be expanded from a deflated condition to an expanded condition with a filling fluid; and a balloon filling valve disposed within and fluidly coupled to said spacer cavity; a balloon spacer defining a spacer cavity configured to be expanded from a deflated condition to an expanded condition with a filling fluid; and a balloon filling valve disposed within and fluidly coupled to said spacer cavity; characterized by: said balloon filling valve is configured to be fluidly coupled to a source of said filling fluid and to selectively allow the introduction and withdrawal of said fluid into and out of said spacer cavity; wherein said balloon filling valve comprises: a central tube comprising a lumen, an outer wall including a proximal opening and a distal opening there through, the central tube coupled to a proximal and a distal portion of said balloon filling valve such that said spacer cavity is defined around said central tube; a valve sheath disposed around said central tube, the valve sheath configured to resiliently engage an outer surface of said central tube; and a valve wire extending through said proximal opening and comprising a tip, the valve wire configured to selectively seal and unseal said balloon filling valve depending on the location of the tip relative to a distal edge of said valve sheath. said balloon filling valve is configured to be fluidly coupled to a source of said filling fluid and to selectively allow the introduction and withdrawal of said fluid into and out of said spacer cavity; wherein said balloon filling valve comprises: a central tube comprising a lumen, an outer wall including a proximal opening and a distal opening there through, the central tube coupled to a proximal and a distal portion of said balloon filling valve such that said spacer cavity is defined around said central tube; a valve sheath disposed around said central tube, the valve sheath configured to resiliently engage an outer surface of said central tube; and a valve wire extending through said proximal opening and comprising a tip, the valve wire configured to selectively seal and unseal said balloon filling valve depending on the location of the tip relative to a distal edge of said valve sheath. a central tube comprising a lumen, an outer wall including a proximal opening and a distal opening there through, the central tube coupled to a proximal and a distal portion of said balloon filling valve such that said spacer cavity is defined around said central tube; a valve sheath disposed around said central tube, the valve sheath configured to resiliently engage an outer surface of said central tube; and a valve wire extending through said proximal opening and comprising a tip, the valve wire configured to selectively seal and unseal said balloon filling valve depending on the location of the tip relative to a distal edge of said valve sheath.