Individual SL distributions in LV myocytes of mice with normal and depressed systolic functions. (A) Histograms showing individual SL distributions in mice with ΔLVP 135.7, 96.4, 7.2, and 4.7 mm Hg (from top to bottom). SL: 1.76 ± 0.18 (Fig. S15 A), 1.74 ± 0.24 (Fig. 3 A), 2.11 ± 0.24 (Fig. 4 A, top left), and 2.03 ± 0.17 (Fig. 4 A, top right) μm for ΔLVP 135.7, 96.4, 7.2, and 4.7 mm Hg, respectively. (B) Same as in A, but the individual maximal SL (SLmax) and minimal SL (SLmin) data from mice with ΔLVP 135.7, 96.4, 7.2, and 4.7 mm Hg (from top to bottom) were plotted. SLmin, light gray; SLmax, dark gray. SLmin: 1.54 ± 0.16, 1.46 ± 0.22, 1.60 ± 0.28, and 1.67 ± 0.18 µm for ΔLVP 135.7, 96.4, 7.2, and 4.7 mm Hg, respectively. SLmax: 1.97 ± 0.17, 2.03 ± 0.26, 2.70 ± 0.45, and 2.37 ± 0.20 µm for ΔLVP 135.7, 96.4, 7.2, and 4.7 mm Hg, respectively. In A and B, two myofibrils were analyzed for 96.4 and 7.2 mm Hg and three myofibrils for 135.7 and 4.7 mm Hg.