Intracardiac Echocardiography-Guided Left Atrial Appendage Occlusion: A Comprehensive Narrative Review.

Intracardiac echocardiography (ICE) is an alternative to transesophageal echocardiography for imaging guidance during left atrial appendage occlusion (LAAO) in patients with atrial fibrillation with intolerance to long-term oral anticoagulation. This narrative review synthesizes contemporary evidence on ICE-guided LAAO. Across observational studies, ICE provides real-time high-resolution imaging enabling accurate trans-septal puncture, device sizing, and deployment under conscious sedation. Procedural success, peri-device leak, and device-related thrombus rates appear comparable between ICE- and TEE-guided LAAO, while ICE may also shorten fluoroscopy time and avoid general anesthesia. Challenges with ICE include operator learning curve, need for additional venous access and intracardiac catheter manipulation, that may add to risks like pericardial effusions, vascular complications and higher costs. Emerging 3D/4D ICE and artificial-intelligence-integrated computed tomographic planning may improve efficiency and allow for combined ablation and LAAO procedures. Further randomized controlled trials and cost-effectiveness studies are needed to define the role of ICE-first approach.