A delivery device for implanting a stented prosthetic heart valve, the device comprising: an outer sheath; an inner shaft disposed within the outer sheath; a deflection assembly (80, 400, 450, 550) attached to the inner shaft and including: a plurality of stacked hinge segments (150, 352, 402, 452, 552), including a proximal-most hinge segment (150b, 352b, 402b, 452b, 552b) and a distal-most hinge segment (150a, 352a, 402a, 452a, 552a), wherein each of the hinge segments (150, 352, 402, 452, 552) are discretely formed as a solid body, and have complimentary engagement features (182, 184, 226, 272, 360, 362, 366, 364, 420, 422, 500, 502, 504, 506, 600, 602, 604, 606) by which immediately adjacent ones of the hinge segments (150, 352, 402, 452, 552) interface with, and can articulate relative to, one another, a joiner hub (154, 356, 406,456, 566) connected to the inner shaft and interfacing with the proximal-most hinge segment (150b, 352b, 402b, 452b, 552b), a leading hub (152, 404, 454, 554) interfacing with the distal-most hinge segment (150a, 352a, 402a, 452a, 552a); and a support shaft attached to and extending distally from the leading hub (152, 404, 454, 554); wherein the delivery device is configured to provide a loaded state in which a stented prosthetic heart valve is compressed over the support shaft and retained within a capsule of the outer sheath; and further wherein a hinge region (90, 408, 458, 558) of the deflection assembly (80, 400, 450, 550) is configured to be deflected by a user to change a spatial orientation of the support shaft relative to the inner shaft while the delivery device is in the loaded state. an outer sheath; an inner shaft disposed within the outer sheath; a deflection assembly (80, 400, 450, 550) attached to the inner shaft and including: a plurality of stacked hinge segments (150, 352, 402, 452, 552), including a proximal-most hinge segment (150b, 352b, 402b, 452b, 552b) and a distal-most hinge segment (150a, 352a, 402a, 452a, 552a), wherein each of the hinge segments (150, 352, 402, 452, 552) are discretely formed as a solid body, and have complimentary engagement features (182, 184, 226, 272, 360, 362, 366, 364, 420, 422, 500, 502, 504, 506, 600, 602, 604, 606) by which immediately adjacent ones of the hinge segments (150, 352, 402, 452, 552) interface with, and can articulate relative to, one another, a joiner hub (154, 356, 406,456, 566) connected to the inner shaft and interfacing with the proximal-most hinge segment (150b, 352b, 402b, 452b, 552b), a leading hub (152, 404, 454, 554) interfacing with the distal-most hinge segment (150a, 352a, 402a, 452a, 552a); and a support shaft attached to and extending distally from the leading hub (152, 404, 454, 554); wherein the delivery device is configured to provide a loaded state in which a stented prosthetic heart valve is compressed over the support shaft and retained within a capsule of the outer sheath; and further wherein a hinge region (90, 408, 458, 558) of the deflection assembly (80, 400, 450, 550) is configured to be deflected by a user to change a spatial orientation of the support shaft relative to the inner shaft while the delivery device is in the loaded state. a plurality of stacked hinge segments (150, 352, 402, 452, 552), including a proximal-most hinge segment (150b, 352b, 402b, 452b, 552b) and a distal-most hinge segment (150a, 352a, 402a, 452a, 552a), wherein each of the hinge segments (150, 352, 402, 452, 552) are discretely formed as a solid body, and have complimentary engagement features (182, 184, 226, 272, 360, 362, 366, 364, 420, 422, 500, 502, 504, 506, 600, 602, 604, 606) by which immediately adjacent ones of the hinge segments (150, 352, 402, 452, 552) interface with, and can articulate relative to, one another, a joiner hub (154, 356, 406,456, 566) connected to the inner shaft and interfacing with the proximal-most hinge segment (150b, 352b, 402b, 452b, 552b), a leading hub (152, 404, 454, 554) interfacing with the distal-most hinge segment (150a, 352a, 402a, 452a, 552a); and a support shaft attached to and extending distally from the leading hub (152, 404, 454, 554); wherein the delivery device is configured to provide a loaded state in which a stented prosthetic heart valve is compressed over the support shaft and retained within a capsule of the outer sheath; and further wherein a hinge region (90, 408, 458, 558) of the deflection assembly (80, 400, 450, 550) is configured to be deflected by a user to change a spatial orientation of the support shaft relative to the inner shaft while the delivery device is in the loaded state.