An intravascular system, comprising: an intravascular guidewire , comprising: a flexible elongate member comprising a proximal portion and a distal portion , wherein the flexible elongate member further comprises a metal core , the metal core having a first diameter, at least one electronic component secured to the distal portion of the flexible elongate member, at the proximal portion of the flexible elongate member, a locking section and a further section having a diameter substantially similar to the first diameter, the locking section and the further section being integral with the metal core; and the locking section including a reduced diameter; wherein the locking section comprises a middle subsection and at least one of the group of a distal subsection and a proximal subsection , wherein the middle subsection is having a second diameter smaller than the first diameter, wherein the distal subsection has the second diameter on its proximal end and the first diameter at its distal end, the distal subsection providing a transition from the first diameter to the second diameter; wherein the proximal subsection has the first diameter at its proximal end and the second diameter at its distal end, the proximal subsection providing a transition from the second diameter to the first diameter; the system further comprising: a connector for coupling to the proximal portion of the flexible elongate member, the connector including a locking clip comprising a slit sized and shaped to receive the locking section of the flexible elongate member; and wherein the locking section is configured to be receivable within the slit of the locking clip for limiting a movement of the locking section relative to the locking clip to the length of the middle subsection . a flexible elongate member comprising a proximal portion and a distal portion , wherein the flexible elongate member further comprises a metal core , the metal core having a first diameter, at least one electronic component secured to the distal portion of the flexible elongate member, at the proximal portion of the flexible elongate member, a locking section and a further section having a diameter substantially similar to the first diameter, the locking section and the further section being integral with the metal core; and the locking section including a reduced diameter; wherein the locking section comprises a middle subsection and at least one of the group of a distal subsection and a proximal subsection , wherein the middle subsection is having a second diameter smaller than the first diameter, wherein the distal subsection has the second diameter on its proximal end and the first diameter at its distal end, the distal subsection providing a transition from the first diameter to the second diameter; wherein the proximal subsection has the first diameter at its proximal end and the second diameter at its distal end, the proximal subsection providing a transition from the second diameter to the first diameter; a connector for coupling to the proximal portion of the flexible elongate member, the connector including a locking clip comprising a slit sized and shaped to receive the locking section of the flexible elongate member; and wherein the locking section is configured to be receivable within the slit of the locking clip for limiting a movement of the locking section relative to the locking clip to the length of the middle subsection . <EOS>