A device for treating tissue adjacent to a body lumen includes a catheter shaft and an energy emitting assembly. The catheter shaft is insertable into the body lumen and includes a plurality of cooling lumens arranged generally circumjacent a generally central lumen. At least some of the circumjacent cooling lumens are in fluid communication with the central lumen and the energy emitting assembly extends through the central lumen. The central lumen and at least one portion of the energy emitting assembly are configured to direct a flow of cooling fluid about an outer surface of the at least one portion of the energy emitting assembly within the central lumen.
