Impact of moderate sedation on electrophysiology lab time for left atrial appendage occlusion using 4D‐intracardiac echocardiography

Abstract Introduction Left atrial appendage occlusion (LAAO) can be performed using diverse anesthetic approaches ranging from moderate sedation (MS) to general anesthesia (GA), and guided by intracardiac echocardiography (ICE) or transesophageal echocardiography (TEE). Prior studies have demonstrated shorter time in lab for heart rhythm procedures performed under MS. The objective of this study was to compare laboratory times, acute procedural outcomes and complication rates for LAAO procedures performed using MS and 4‐dimensional ICE as opposed to GA. Methods and Results This was a retrospective observational cohort study of 135 consecutive patients who were referred for LAAO to be performed with either GA or MS between June 2022 and April 2024. The primary endpoints were total laboratory time, procedure time, nonprocedure time, and fluoroscopy time. The secondary endpoints were stroke, peri‐device leak (>5 mm), device‐related left atrial thrombus, cardiovascular mortality, and all‐cause mortality at 45 days and 6 months postprocedure, where data were available. The mean age of patients in the study was 78.8 ± 7.8 years and 64.4% were male with no difference between GA and MS. In the MS group, 4D‐ICE was used for intraprocedural imaging in 95.5% of patients and 2 dimensional‐ICE (2D‐ICE) was used in 4.5% of patients. In the GA group, intra‐procedural imaging was done using TEE in 51.5%, 2D‐ICE in 32.4% and 4D‐ICE in 16.2% of cases. Total laboratory time was significantly lower in the MS group compared to the GA group (68.3 ± 23.1 vs 117.1 ± 34.3 min; p < 0.001), due to shorter nonprocedure time (15.2 ± 9.1 vs 63.7 ± 22.0 min; p < 0.001), with no significant difference in procedure time and fluoroscopy time. There was no significant difference in complications at 45 days and 6 months postprocedure. Conclusion In this single center study, MS reduced total lab time by reducing nonprocedure time when compared to GA for LAAO, without affecting clinical outcomes.