EXTRÉMITÉS SOUPLES DE CATHÉTER DE CARTOGRAPHIE HAUTE DENSITÉ ET EXTRÉMITÉS SOUPLES DE CATHÉTER D'ABLATION COMPORTANT DES ÉLECTRODES DE CARTOGRAPHIE HAUTE DENSITÉ EMBARQUÉES
A catheter comprising a catheter shaft comprising a proximal end and a distal end, the catheter shaft defining a catheter shaft longitudinal axis extending between the proximal end and the distal end； a flexible tip portion located adjacent to the distal end of the catheter shaft, the flexible tip portion comprising a flexible framework comprising nonconductive material； and a plurality of microelectrodes (196) mounted on the flexible framework and forming a flexible array of microelectrodes adapted to conform to tissue； wherein the flexible framework is configured to facilitate relative movement among at least some of the microelectrodes (196) relative to other of the microelectrodes (196)； and wherein the nonconductive material insulates each microelectrode from other microelectrodes (196)； wherein the plurality of microelectrodes (196) are mounted on the flexible framework and arranged in a plurality of groups； wherein each group of the plurality of groups of microelectrodes (196) comprises a row of longitudinally-aligned microelectrodes aligned parallel to the catheter shaft longitudinal axis； and wherein the flexible array of microelectrodes (196) comprises a two-sided planar array of microelectrodes, wherein the microelectrodes are configured for contacting tissue on a front side and a back side of the planar array； wherein the flexible framework comprises a plurality of longitudinally-extending and laterally separated arms (190, 192, 194, 188) extending parallel to the catheter shaft longitudinal axis, and lying in a plane； wherein each longitudinally-extending arm (190, 192, 194, 188) has a group of the plurality of groups of microelectrodes (196) distributed and located thereon； wherein a proximal bushing (206) is mounted on the distal end of the catheter shaft； wherein the proximal portion of each of the longitudinally-extending arms extends through the proximal bushing； wherein each longitudinally-extending arm exits from a distal end of the proximal bush
