CPT® Code 33269

Exclusion of left atrial appendage, thoracoscopic, any method (eg, excision, isolation via stapling, oversewing, ligation, plication, clip)

The CPT® Code 33269 refers to the thoracoscopic exclusion of the left atrial appendage (LAA), a procedure that is particularly relevant for patients diagnosed with non-valvular atrial fibrillation (NVAF) who are at an elevated risk for thrombus formation or stroke, especially when oral anticoagulation therapy is not a viable option. The LAA is a small, pouch-like structure located in the left atrium of the heart, which can be a site for blood clots to form, potentially leading to serious complications such as stroke. The procedure aims to completely close off or remove the LAA to mitigate this risk. The LAA exhibits considerable anatomical variability, categorized into four distinct morphological groups: the 'chicken wing' type, characterized by a bend in the proximal end of the dominant lobe; the 'windsock' type, which features a long main lobe exceeding 4 cm; the 'cauliflower' type, which has a limited length of less than 4 cm and lacks forked lobes; and the 'cactus' type, which has a dominant central lobe with secondary extension lobes. The unique size and shape of the LAA, along with factors such as the pressure or loading status of the heart and whether the patient is in sinus rhythm or atrial fibrillation, play a crucial role in determining the most appropriate closure method. In practice, the thoracoscopic approach typically involves the deployment of a clip under general anesthesia. This minimally invasive technique requires the placement of thoracoscopic ports between the ribs on the left side of the chest, allowing for the insertion of an endoscope. The clip is then carefully positioned at the base of the LAA, with its correct placement verified through transesophageal echocardiography, ensuring the effectiveness of the procedure in preventing potential thrombus formation.