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Figure 1 Original patent foramen ovale-Star occluder is demonstrated with the center post, the expanded nitinol wires and the two Ivalon sails (left). After implantation the device is shown by transesophageal echocardiography in the vertical biatrial view (middle) and by magnetic resonance imaging in the four-chamber view (right). Ao = aorta; LA = left atrium; RA = right atrium.