PMC5420043_01
Left atrial voltage map pre- and post-pulmonary vein isolation. Voltage maps of the left atrium were created using the St Jude Medical Ensite NavX system before (A) and after (B) pulmonary vein isolation, with purple representing voltage >1.5 mV and gray representing voltage <0.2 mV.
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Detailed 3-dimensional mapping using the St Jude Medical Ensite NavX system was performed at the start of the procedure and after PVI (Figure 1).