Cardiac sympathetic nerve activities in the ventricle. (A) Sympathetic neuron marker densities among all groups. (B) The example of TH staining. (a) Control rabbits left ventricle; (b) HFD rabbits left ventricle; (c) HFD-HF rabbits left ventricle; (d) HFD-HF-RDN rabbits left ventricle; (e) Control rabbits right ventricle; (f) HFD rabbits right ventricle; (g) HFD-HF rabbits right ventricle; and (h) HFD-HF-RDN rabbits right ventricle. HF, heart failure; HFD, high-fat diet; RDN, renal denervation. **P<0.01 vs. Control, ^$P < 0.05 vs. HFD-HF-RDN and ^$$P<0.01 vs. HFD-HF-RDN.