Configurations of coil for endovascular therapy system

A method comprising:

• introducing an endovascular device into vasculature of a patient, the endovascular device comprising:
• an elongated body configured to be introduced into the vasculature of the patient, and
• a coil structure at a distal portion of the elongated body, the coil structure including:
• a first coil portion configured to carry a plurality of electrodes, and
• a second coil portion formed from a coiled wire such that the second coil portion together with the coiled wire defines a coiled coil, the coiled wire extending distally of a distal end of the first coil portion and configured to anchor the elongated body and the coil structure within the vasculature of the patient;
• and
• advancing the endovascular device until the plurality of electrodes are at or near a target location in the vasculature of the patient.