CPT® Code 93631

Intra-operative epicardial and endocardial pacing and mapping to localize the site of tachycardia or zone of slow conduction for surgical correction

The procedure described by CPT® Code 93631 involves intra-operative epicardial and endocardial pacing and mapping, which is a critical step in the surgical management of tachycardia. This procedure is performed during an open heart surgery, where the physician aims to identify the specific site of tachycardia or the zone of slow conduction that requires surgical correction. The process begins with the placement of electrodes on the surface of the heart and within the heart chambers, allowing for direct interaction with the cardiac tissue. The physician then induces or attempts to induce the arrhythmia by applying pacing at various rates or through programmed stimulation, which involves delivering timed electrical impulses to the heart. During this phase, catheters that are inserted into the heart may be repositioned to optimize the mapping and pacing process. The physician conducts pacing or programmed stimulation at multiple sites within the heart to gather comprehensive data on the arrhythmia. The mapping techniques employed can be either standard or three-dimensional (3D). Standard mapping involves sequential recordings from different points within the heart, creating a detailed map of the tachycardia sites based on these recordings. In contrast, 3D mapping utilizes simultaneous recordings from multiple electrodes on a single catheter, which are then processed through computer reconstruction to visualize the tachycardia sequence in three dimensions. This advanced mapping technique enhances the accuracy of identifying the arrhythmia's origin and understanding its electrical pathways. At the conclusion of the mapping procedure, the physician interprets all recordings, pacing, and mapping data, culminating in a comprehensive written report that details the findings and guides the subsequent surgical intervention.