Abstract: The present disclosure provides ablation catheter systems and electrode assemblies, including electrode baskets, for use in the ablation catheter systems for ablating tissue. The electrode baskets include a plurality of struts having a plurality of electrodes asymmetrically arranged on the plurality of struts such that upon simultaneous energizing of the plurality of electrodes during any single application of the ablation procedure, lesions are created on only one half of less of the circumference of the vessel.

Abstract: The present disclosure provides ablation catheter systems and electrode assemblies, including electrode baskets, for use in the ablation catheter systems for ablating tissue. The electrode baskets include a plurality of struts having a plurality of electrodes asymmetrically arranged on the plurality of struts such that upon simultaneous energizing of the plurality of electrodes during any single application of the ablation procedure, lesions are created on only one half of less of the circumference of the vessel.

Abstract: In an electrode assembly for a catheter system, a plurality of struts each extend from a proximal end to a distal end of the electrode assembly. Each strut spirals about the longitudinal axis of the electrode assembly and has a corresponding electrode disposed thereon. The electrode assembly is configurable between a collapsed configuration and an expanded configuration, with the electrodes being transversely spaced from the longitudinal axis of the electrode assembly a greater distance in the expanded configuration than in the collapsed configuration. In the expanded configuration the electrodes are transversely equally spaced from the longitudinal axis of the electrode assembly. In other aspects, at least one asymmetric element is provided on the electrode assembly to facilitate symmetric expansion about the longitudinal axis of the assembly. In another aspect, the electrode assembly is a single coil that winds about the longitudinal axis of the assembly.