Endocardial (Watchman) vs epicardial (Lariat) left atrial appendage exclusion devices: Understanding the differences in the location and type of leaks and their clinical implications.

Background: Watchman and Lariat left atrial appendage (LAA) occlusion devices are associated with LAA leaks postdeployment.

Objective: The purpose of this study was to compare the incidence, characteristics, and clinical significance of these leaks.

Methods: We performed a multicenter prospective observational study of all patients who underwent LAA closure.