Objectives: We sought to evaluate the effect of increasing experience with left atrial appendage (LAA) closure on short-term outcome.
Background: Data regarding the impact of the learning curve of LAA closure-particularly regarding technical aspects of the procedure-are lacking.
Methods: The present analysis represents first data from a single-center all-comer registry. The population was divided into 3 groups according to treatment time (group 1: patients 1-30; group 2: patients 31-60; group 3: patients 61-90).
Results: The mean age of the population was 77 years. Median CHA2 DS2 VASC Score and HAS-BLED were 5 (IQR 3-5) and 3 (IQR 3-4), respectively. Implantation success was 90% with a slight but not statistically significant increase during the course of the registry. Procedure time (75 [62-108] vs. 50 [43-66] vs. 47 [41-61] minutes; P < 0.0001), fluoroscopy time (20 [15-30] vs. 11 [8-19] vs. 11 [9-18] minutes; P = 0.002), and contrast volume (105 [70-170] vs. 60 [50-75] vs. 50 [50-73] ml; P < 0.0001) were reduced across the 3 groups. In-hospital complications decreased significantly (20 vs. 7% vs. 0%; P = 0.021). The compression grade of the occluder was chosen higher with increasing learning curve (15 [11-25] vs. 25 [17-29] vs. 21 [14-26] %; P = 0.05).
Conclusions: With increasing operator experience the performance and safety of percutaneous LAA closure improved continuously.
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