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Figure 4 Macroscopic findings of the endocardial site after successful pulmonary vein (PV) isolation. The ablated lesion is relatively well demarcated (brownish in color) and located near the junction between the left atrium and PV trunks. Note that the ostia of the superior (S) and inferior (I) PVs are encircled by the ablated lesion. MA = mitral annulus. See text for details.
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