CPT® Code 0745T

Cardiac focal ablation utilizing radiation therapy for arrhythmia; noninvasive arrhythmia localization and mapping of arrhythmia site (nidus), derived from anatomical image data (eg, CT, MRI, or myocardial perfusion scan) and electrical data (eg, 12-lead ECG data), and identification of areas of avoidance

Cardiac focal ablation utilizing radiation therapy for arrhythmia is a sophisticated noninvasive procedure aimed at treating heart arrhythmias, particularly focusing on conditions such as ventricular tachycardia (VT). This technique involves the precise localization and mapping of the arrhythmia site, also known as the nidus, which is essential for developing an effective radiation treatment plan. The process begins with the electrophysiologist utilizing various anatomical imaging modalities, such as computed tomography (CT), magnetic resonance imaging (MRI), or myocardial perfusion scans, in conjunction with electrical data derived from 12-lead electrocardiogram (ECG) readings. The primary goal of this procedure is to identify the specific areas within the heart that are responsible for the abnormal electrical activity leading to arrhythmias. This includes determining the origin of the tachycardic beats, the pathways of the electrical circuits involved, and any previously ablated sites that need to be considered. Additionally, the procedure involves mapping scar tissue within the heart, which may be assessed through existing imaging studies or previous cardiac catheterization lab mappings. The electrophysiologist evaluates the depth and extent of the scar tissue, which can range from epicardial to endocardial layers, and assesses whether the tachycardic circuits are present within these scarred areas. Understanding the underlying causes of scarring, such as ischemic cardiomyopathy, is also crucial. By integrating both anatomical and electrical imaging data, the electrophysiologist can utilize specialized software to identify the affected regions accurately. This comprehensive mapping allows for the determination of which cardiac segments should be targeted during the radiation ablation treatment, while also identifying adjacent structures that require protection throughout the procedure. Overall, this noninvasive approach is pivotal in effectively managing arrhythmias and improving patient outcomes.