1. A catheter apparatus, comprising: an elongated shaft having a proximal portion and a distal portion, wherein the distal portion of the shaft is configured for intravascular delivery to a renal artery of a human patient; a tubular control member slidably received within the distal portion of the shaft and extending distally therefrom along a central axis; a treatment section affixed to and extending distally of the distal portion of the elongated shaft and spirally disposed about the control member; and a plurality of energy delivery elements carried by the treatment section and including at least a first energy delivery element and a second energy delivery element axially and radially spaced apart from one another about the central axis, wherein the tubular control member defines a central lumen configured to receive a guide wire, and wherein the control member further comprises an opening proximally adjacent to the treatment section and adapted for exit of the guide wire, wherein the control member is operably couple to a distal region of the spiral treatment section, and wherein distal movement of the control member places the spiral treatment section in a low-profile delivery configuration; and proximal movement of the control member places the spiral treatment section in an expanded treatment configuration.