A double loop catheter for delivering ablation energy, the catheter comprising a catheter sheath having a proximal end, a distal end and at least one lumen extending therethrough and having a first loop structure having a proximal end, and a distal end and a second loop structure having a proximal end and a distal end. The first loop structure and the second loop structure being receivable in the at least one lumen of the catheter sheath, and the first loop structure and the second loop structure being configurable to extend distally of the distal end of the catheter sheath. The first loop structure comprising a first electrode near to the distal end of the first loop structure and the second loop structure comprising a second electrode near to the distal end of the second loop structure, wherein the first loop structure and the second loop structure are displaceable relative to each other.
