CPT® Code 33259

Add-On Code

Operative tissue ablation and reconstruction of atria, performed at the time of other cardiac procedure(s), extensive (eg, maze procedure), with cardiopulmonary bypass (List separately in addition to code for primary procedure)

Operative tissue ablation and reconstruction of the atria, as described by CPT® Code 33259, refers to a complex surgical procedure aimed at correcting chronic atrial fibrillation, which is characterized by rapid and uncoordinated contractions of the upper chambers of the heart, leading to an irregular and often rapid heartbeat. This extensive procedure is typically performed in conjunction with other cardiac surgeries, particularly during a maze procedure, which is designed to create new electrical pathways in the heart. The maze procedure interrupts the abnormal electrical circuits that contribute to atrial fibrillation, allowing for the restoration of normal electrical conduction from the sinoatrial node to the atrioventricular node. The procedure is conducted under cardiopulmonary bypass, which is a technique that temporarily takes over the function of the heart and lungs during surgery, ensuring that blood continues to circulate and oxygenate the body. The surgical approach involves making incisions in the left atrium, often through the interatrial groove, and utilizing a sling around the inferior vena cava to enhance visibility and access to the heart structures. The excision of the atrial appendage and the creation of precise incisions in the atrial tissue are critical steps that prevent the conduction of abnormal impulses, thereby allowing the atria to regain normal contractions and size. The suturing of incision sites and the use of a pericardial strip for reinforcement are essential for ensuring the integrity of the surgical site. Ultimately, this procedure aims to restore the atrial function, enabling it to effectively hold and pump blood to the ventricles while eliminating the fibrillation that characterizes atrial fibrillation.