AAV-mediated ΔPDZ nNOS expression improves cardiac function in aged mdx model. (A) ECG results. N = 11, 12 and 9 for BL10, untreated and treated mdx, respectively. (B) Left ventricular hemodynamic results. N = 16, 13 and 5 for BL10, untreated and treated mdx, respectively. Asterisk: treated mdx is significantly different from that of untreated mdx; pound sign: BL10 is significantly different from that of untreated mdx; cross: significantly different from other two groups.