| abstract |
A device includes a handle, an expandable structure including a plurality of nsplines extending from a proximal hub to a distal hub, a first electrode on a first nspline of the plurality of splines, an outer tube extending from the handle to the proximal nhub, and a shaft extending through the outer tube from the handle to the distal hub. The nexpandable structure has a collapsed state and a self-expanded state. The handle is nconfigured to retract the shaft. Retracting the shaft may expand the expandable structure noutward of the self-expanded state. |