<p><b>A,</b> representative recordings of left ventricular pressure (LVP) and dP/dt at baseline and during saline or Y-27632 infusion (1 µM) for 5 min in NTL hearts (top panel); composite data (n = 7, bottom panel); <b>B,</b> representative Western blots (top panel) and pooled data (n = 4/group) normalized for GAPDH loading, showing p-MYPT1(Thr696), total MYPT1, and their ratio (middle panel) and p-cMLC2(Ser20), total cMLC2, and their ratio (bottom panel). Data are shown as the mean ± SEM. *<i>P</i><0.05, **<i>P</i><0.01, ***<i>P<</i>0.001 vs. control.</p
