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Figure 6 Attenuation of QRS potentials was noted in this patient (Pt) before (day 21) continuous venovenous hemofiltration carried out for seven days, with marked recovery of the potentials, paralleling the loss of weight (day 28). Meanwhile, the intracardiac electrocardiograms (IC-ECGs) did not change. The echocardiogram (2D-Echo) revealed a barely perceptible pericardial effusion (day 20). A4-Ch = apical four-chamber view; LA = left atrium; LV = left ventricle; RA = right atrium; RV = right ventricle.