Abstract: Methods, systems, and devices for ablating nerves within an artery. The method includes selecting an ablation device having an outer guiding catheter and an inner treatment catheter including an expandable element and an ablative element on the expandable element. The ablation device is selected such that the expandable element is sized to apply an outward force against a portion of the inner wall of the artery substantially sufficient to hold the artery open during an arterial spasm event. The method can include advancing the ablation device to the treatment location, positioning the treatment catheter out of the guiding catheter, expanding the expandable element such that after expansion the expandable element applies the outward force against the portion of the inner wall of the artery, and ablating the inner wall of the artery using the ablation element after expanding the expandable element and without moving the treatment catheter.