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Figure 4 Effect of pressure overload on cell shortening (CS) in cardiomyocytes from wild-type (WT) and Nox2^–/– mice. (A and B) Representative traces of myocyte contraction. (C and D) Mean ± SEM from 60 cells from four hearts. Dark columns = banded mice; lighter columns = shams. *p < 0.05 versus sham.