Proteasomal activity and cardiac function in subchronic Cfz protocols. (A) Proteasomal activity in myocardial tissue in experimental protocols 4 and 5B. (B) Proteasomal activity in PBMCs in experimental protocols 4 and 5B. (C) Representative echocardiographic M-mode images of protocol 4 at baseline and end point. (D) Representative echocardiographic M-mode images of protocol 5B at baseline and end point. (E) FS% graph of protocol 4 (circles, individual values). (F) FS% graph of protocol 5B (circles, individual values). *P < .05, **P < .01.