Procedural characteristics
The LAAC procedure with the LAmbre device was successfully performed in 58 (98.3%) patients in the CM group and in 163 (98.8%) patients in the MM group. There were no significant differences in LAA size and LAA anatomy between the two groups. The mean umbrella and cover diameters of the implanted device were similar in the two groups. The rate of a fully open umbrella was significantly higher in the MM group than in the CM group (P<0.001). The rate of a device requiring recapture and the mean number of recaptures were significantly lower in the MM group than in the CM group (both P<0.05). LAAC with complete coverage of the LAA16 was achieved in most of the patients in both groups (70.2% vs 60.3%). The rates of partial prolapse and complete prolapse into the LAA neck were also similar in the two groups (Table 2).