The provider inserts a catheter to a specific esophageal site. The electrodes on the tip of the catheter detect the optimal location to receive the signal to obtain esophageal electrograms of the atria. Since the esophagus passes close to the left atrium, physicians can use a swallowed exploring electrode attached to a fine piece of wire to detect atrial activity during arrhythmias. The procedure may or may not include ventricular recording. This code represents both the technical and professional components of the service.
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