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. 2009 Apr 9;4(4):e5155. doi: 10.1371/journal.pone.0005155

Figure 4. Contractile properties of LV muscle bundles in E20 chick embryos.

Figure 4

A, the length-active tension relationship of LV muscle bundles is depressed in hypoxic E20 chick embryo hearts. B, LV contractility was lower in hypoxic LV muscle bundles. C, passive tension during stretching of LV muscle bundles is higher in hypoxic hearts, n = 6 and n = 8, respectively. D, the time to 50% relaxation is significantly prolonged in hypoxic as compared with normoxic hearts, both in response to increasing calcium concentrations, both n = 9. Data are shown as mean±SE; * P<0.05, ** P<0.01 Hypoxia versus Normoxia.