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The SG angle and the change in SG angle during follow up periods in each SG size. (A) Change in postoperative SG angle; (B) change in recent period SG angle; and (C) change in SG angle postoperatively to recent periods; (D) changes in SG orientation after TAR with FET. *, means P<0.05 between preoperative vs. recent periods; †, means P<0.05 between postoperative vs. recent periods. SG, stent graft, TAR, total arch replacement; FET, frozen elephant trunk.
