CPT® Code 93621

Add-On Code

Comprehensive electrophysiologic evaluation including insertion and repositioning of multiple electrode catheters with induction or attempted induction of arrhythmia; with left atrial pacing and recording from coronary sinus or left atrium (List separately in addition to code for primary procedure)

The CPT® Code 93621 refers to a comprehensive electrophysiologic evaluation that includes the insertion and repositioning of multiple electrode catheters, with the specific focus on left atrial pacing and recording from either the coronary sinus or the left atrium. This procedure is performed in conjunction with the primary electrophysiologic study, which is detailed under CPT® Code 93620. During this evaluation, the physician aims to induce or attempt to induce arrhythmia, which is a condition characterized by irregular heartbeats. The procedure involves accessing the heart through a blood vessel, typically in the groin, where catheters equipped with recording and stimulating electrodes are inserted. These catheters are then navigated into the heart's right atrium and right ventricle to measure and record electrical activity, as well as to pace the heart. The bundle of His, a critical component of the heart's electrical conduction system, is also monitored during this process. Following the comprehensive study, the physician performs left atrial pacing and recording, which involves placing an electrode catheter in the coronary sinus or left atrium to obtain optimal electrocardiogram (ECG) recordings. This additional step is crucial for a thorough evaluation of the heart's electrical activity and for the potential induction of arrhythmias from the left atrial site.