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Figure 4 Three-dimensionalsolid geometry maps of the left atrium in different views, showing the location of the involved gaps (red points) and foci (blue stars). Most of the gaps and all three foci are located over the septal aspect of the right veins and the anterior aspect of the left superior pulmonary vein (LSPV) ostium. AP = antero-posterior; LAA = left anterior atrium; LL = left lateral; LIPV = left inferior pulmonary vein; PA = postero-anterior; RAO = right anterior oblique; RIPV = right inferior pulmonary vein; RL = right lateral; ROOF = cranial view; RSPV = right superior pulmonary vein.
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