An apparatus , comprising: an outer sheath defining a first lumen , the outer sheath configured to receive a prosthetic heart valve in a compressed configuration; a tube member movably disposed within the first lumen of the outer sheath and defining a second lumen ; a valve holder , at least a portion of which is movably disposed within the second lumen of the tube member, the valve holder configured to be releasably coupled to the prosthetic heart valve during delivery of the prosthetic heart valve to a heart; and a retention device coupled to a distal end portion of the tube member, the retention device characterised by : a proximal retention member defining a first opening , a center retention member including a first pin and defining a second opening , and a distal retention member including a second pin , the proximal retention member being fixedly coupled to the tube member, the center retention member being axially movable relative to the proximal retention member between a first position in which the first pin is spaced from the proximal retention member and a second position in which the first pin is disposed within the first opening of the proximal retention member, the distal retention member being axially movable relative to the center retention member between a first position in which the second pin is disposed at a spaced distance from the center retention member and a second position in which the second pin is disposed within the second opening, the retention device configured to be actuated to secure an actuation wire releasably coupled to a prosthetic heart valve to the retention device when at least one of the center retention member is moved to its second position and the first pin secures a first loop of the actuation wire to the retention member or the distal retention member is moved to its second position and the second pin secures a second loop of the actuation wire to the retention device. an outer sheath defining a first lumen , the outer sheath configured to receive a prosthetic heart valve in a compressed configuration; a tube member movably disposed within the first lumen of the outer sheath and defining a second lumen ; a valve holder , at least a portion of which is movably disposed within the second lumen of the tube member, the valve holder configured to be releasably coupled to the prosthetic heart valve during delivery of the prosthetic heart valve to a heart; and a retention device coupled to a distal end portion of the tube member, the retention device characterised by : a proximal retention member defining a first opening , a center retention member including a first pin and defining a second opening , and a distal retention member including a second pin , the proximal retention member being fixedly coupled to the tube member, the center retention member being axially movable relative to the proximal retention member between a first position in which the first pin is spaced from the proximal retention member and a second position in which the first pin is disposed within the first opening of the proximal retention member, the distal retention member being axially movable relative to the center retention member between a first position in which the second pin is disposed at a spaced distance from the center retention member and a second position in which the second pin is disposed within the second opening, the retention device configured to be actuated to secure an actuation wire releasably coupled to a prosthetic heart valve to the retention device when at least one of the center retention member is moved to its second position and the first pin secures a first loop of the actuation wire to the retention member or the distal retention member is moved to its second position and the second pin secures a second loop of the actuation wire to the retention device. <EOS>