A catheter and handle assembly adapted to be coupled to a delivery device, the delivery device having a proximal working port, a distal working end, and a working channel extending between the working port and the working end thereby defining a working length, the assembly comprising: a catheter assembly including -- an elongate shaft; an ablation assembly coupled to a first end of the elongate shaft, the ablation assembly having an energy emitter thereon; a handle assembly coupled to a second end of the elongate shaft, the handle assembly including - a handle frame and a control, the control being movable relative to the handle frame, wherein the handle assembly is coupled to the elongate shaft such that moving the control moves the ablation assembly in an axial and a circumferential direction relative to the handle frame; and a coupling assembly configured to couple to the handle assembly to the working port of the delivery device, the coupling assembly configured to remain being fixed relative to the delivery device and the handle frame, wherein a first portion of the elongate shaft is configured to extend within and through the working channel of the delivery device when the catheter and handle assembly is operably coupled to the delivery device, and the control comprises a body configured to rotate circumferentially around a longitudinal axis of the handle frame when the catheter and handle assembly is coupled to the delivery device to rotate the ablation assembly with respect to the delivery device, and configured to move axially along the longitudinal axis of the handle frame to move the ablation assembly axially with respect to the delivery device between a first axial position and an axial second position, wherein the handle frame is configured to be axially extendable into and out of the control via axial translation of the control. a catheter assembly including -- an elongate shaft; an ablation assembly coupled to a first end of the elongate shaft, the ablation assembly having an energy emitter thereon; a handle assembly coupled to a second end of the elongate shaft, the handle assembly including - a handle frame and a control, the control being movable relative to the handle frame, wherein the handle assembly is coupled to the elongate shaft such that moving the control moves the ablation assembly in an axial and a circumferential direction relative to the handle frame; and a coupling assembly configured to couple to the handle assembly to the working port of the delivery device, the coupling assembly configured to remain being fixed relative to the delivery device and the handle frame, an elongate shaft; an ablation assembly coupled to a first end of the elongate shaft, the ablation assembly having an energy emitter thereon; a handle assembly coupled to a second end of the elongate shaft, the handle assembly including - a handle frame and a control, the control being movable relative to the handle frame, wherein the handle assembly is coupled to the elongate shaft such that moving the control moves the ablation assembly in an axial and a circumferential direction relative to the handle frame; and a coupling assembly configured to couple to the handle assembly to the working port of the delivery device, the coupling assembly configured to remain being fixed relative to the delivery device and the handle frame, wherein a first portion of the elongate shaft is configured to extend within and through the working channel of the delivery device when the catheter and handle assembly is operably coupled to the delivery device, and the control comprises a body configured to rotate circumferentially around a longitudinal axis of the handle frame when the catheter and handle assembly is coupled to the delivery device to rotate the ablation assembly with respect to the delivery device, and configured to move axially along the longitudinal axis of the handle frame to move the ablation assembly axially with respect to the delivery device between a first axial position and an axial second position, wherein the handle frame is configured to be axially extendable into and out of the control via axial translation of the control.