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. 2015 Jun 9;2(1):e000226. doi: 10.1136/openhrt-2014-000226

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Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions

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(A) Standard 12-lead ECG from a patient with Eisenmenger syndrome. Marked right ventricular hypertrophy: R >1 mV in V1, R/S >1 in V1, R/S <1 in V4, V5, V6, right atrial hypertrophy, and right axis deviation 153. (B) New electrode placement ECG from the patient shown in figure 6A, QRS axis 155; findings are identical to the standard.