Patent ID: 7771421
Filing Date: 2010-08-10
Classification: A61B

Abstract:
1. A catheter assembly, comprising: a catheter body including a proximal portion, an intermediate portion extending from the proximal portion and a distal portion extending from the intermediate portion; the distal portion forming a distally decreasing radius helix including an ablation section having a predetermined frontal diameter, the ablation section including a plurality of independently operable ablative elements; a plurality of reference electrodes not coupled to the ablative energy source, the reference electrodes coupled to the distal portion, distal to the ablation section, wherein electrical activity sensed by the electrodes facilitates selective ablation via one or more of the plurality of ablative elements; and an ablative energy source coupled to the ablation section to activate the ablative elements; wherein upon activation by the energy source, one or more of the plurality of ablative elements ablates a desired lesion pattern.