An elongate catheter, comprising: an elongate sheath extending between a distal end portion and a proximal end portion, and a first lumen that extends through the sheath between the distal end portion and the proximal end portion, the distal end portion extends from the proximal end portion to a distal tip and is configured to be repositionable between a first configuration where the distal end portion extends along a longitudinal axis of the proximal end portion, and a first arcuate configuration where the distal end portion curves arcuately away from a longitudinal axis of the proximal end portion, the distal end portion comprises a plurality of rigid segments that are disposed in series along the length of the distal end portion within the sheath, the plurality of rigid segments each includes a top edge, a bottom edge, a side portion extending between the top edge and the bottom edge, and an inner cavity disposed therethrough, wherein the plurality of rigid segments are disposed such that the top edge of a second rigid segment of the plurality of rigid segments is disposed below the bottom edge of a first rigid segment of the plurality of rigid segments, wherein the first rigid segment is disposed closer to the distal tip than the second rigid segment, wherein the plurality of rigid segments are configured such that an amount of possible curvature of the distal end portion can be controlled by providing the plurality of rigid segments with different geometries, and wherein the first lumen extends through the inner cavity of each of the plurality of rigid segments, further comprising a first wire disposed through the sheath and fixed with respect to the distal tip, the first wire extending outboard of each of the plurality of rigid segments, wherein the catheter is configured such that a proximal longitudinal force applied to the first wire urges the distal end portion toward the first arcuate configuration, wherein two or more neighboring rigid segments pivot with respect to each other as the distal end repositions between the first configuration and the first arcuate configuration. an elongate sheath extending between a distal end portion and a proximal end portion, and a first lumen that extends through the sheath between the distal end portion and the proximal end portion, the distal end portion extends from the proximal end portion to a distal tip and is configured to be repositionable between a first configuration where the distal end portion extends along a longitudinal axis of the proximal end portion, and a first arcuate configuration where the distal end portion curves arcuately away from a longitudinal axis of the proximal end portion, the distal end portion comprises a plurality of rigid segments that are disposed in series along the length of the distal end portion within the sheath, the plurality of rigid segments each includes a top edge, a bottom edge, a side portion extending between the top edge and the bottom edge, and an inner cavity disposed therethrough, wherein the plurality of rigid segments are disposed such that the top edge of a second rigid segment of the plurality of rigid segments is disposed below the bottom edge of a first rigid segment of the plurality of rigid segments, wherein the first rigid segment is disposed closer to the distal tip than the second rigid segment, wherein the plurality of rigid segments are configured such that an amount of possible curvature of the distal end portion can be controlled by providing the plurality of rigid segments with different geometries, and wherein the first lumen extends through the inner cavity of each of the plurality of rigid segments, further comprising a first wire disposed through the sheath and fixed with respect to the distal tip, the first wire extending outboard of each of the plurality of rigid segments, wherein the catheter is configured such that a proximal longitudinal force applied to the first wire urges the distal end portion toward the first arcuate configuration, wherein two or more neighboring rigid segments pivot with respect to each other as the distal end repositions between the first configuration and the first arcuate configuration.