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Figure 1 Evaluation of pulmonary venous ostial insertion in three different orthogonal planes in a patient with separate insertion of both left and right pulmonary veins in the left atrium. The dotted line depicts the extrapolated outer left atrial border. (A) Sagittal plane. Both left pulmonary veins enter the left atrium separately. (B) Coronal plane and (C) transversal plane. (D) Three-dimensional reconstruction. No common truncal part is observed in any plane before the veins enter the left atrium. Left atrial insertion of these veins was therefore designated as separate. LA = left atrium; LIPV = left inferior pulmonary vein; LSPV = left superior pulmonary vein; RIPV = right inferior pulmonary vein; RSPV = right superior pulmonary vein.
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