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A: A crevasse of about 2∗2 cm can be seen in the posterior wall of the left atrium, a vegetation about 5∗0.5 cm in size and some thrombus adherent to the posterior wall of the left atrium were also found.; B: Bovine pericardial patch was used to repair the perforated posterior wall of the left atrium during the operation (as shown by the arrow).
