Heat exchange and temperature sensing device and method of use

A heat exchanging device for regulating a temperature of an esophagus when heat or cold is delivered to a left atrium of a heart, comprising:

• an elongated shaft comprising a distal end and a proximal end, the elongated shaft defining at least a first lumen and a second lumen;
• a heat exchanger attached to the distal end of the elongated shaft, the heat exchanger comprising an insertable configuration, a heat exchanging configuration, a distal end, a proximal end, and a cavity therebetween, at least a portion of said cavity being in fluid communication with the first lumen and the second lumen of the elongated shaft;
• wherein a cross-section of the heat exchanger in the insertable configuration is smaller than a cross-section of the heat exchanger in the heat exchanging configuration, wherein said cross-section of the heat exchanger in the heat exchanging configuration substantially conforms to and corresponds with a cross-section of an inside surface of the esophagus such that the esophagus is substantially maintained in its natural shape and location when the heat exchanger is in its heat exchanging configuration, and wherein said shape of the heat exchanger is constrained by a weld pattern, wherein the weld pattern comprises at least one weld, and wherein said at least one weld attaches at least part of an anterior surface of the heat exchanger and a posterior surface of the heat exchanger;
• wherein the heat exchanger comprises a first zone and a second zone which can be identified under imaging, the first zone having a first temperature sensor and the second zone having a second temperature sensor, whereby the heat exchanging device is operable to be moved such that a selected zone with a preferred temperature is adjacent to a heart of a patient.