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Changes in baseline left atrial volume six weeks and six months after LAA closure. Δ-LAVmax and Δ-LAVmin are shown for all patients, as well as for the subgroups with and without a residual interatrial shunt. The increase in Δ-LAVmax and Δ-LAVmin after six weeks and six months was significant in all patients. Patients with no residual atrial shunt after transseptal access showed a significantly higher increase in Δ-LAVmax or Δ-LAVmin, as compared to those with a residual one
