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Figure 3 (A) A 23-year-old man with acute lymphatic leukemia who was treated with prednisolone due to recurrent malignant pericardial effusion. Note low QRS voltage in the limb leads before initiation of medical treatment. (B) Same patient as in (A) six days after initiation of anti-inflammatory treatment. Note the change of the QRS axis and the significant increase of maximum QRS amplitude in the limb leads. LV = left ventricle; RV = right ventricle.