KCNA4 and myocardial infarction: Compared to sham rats, Kv1.4, Kv3.4, Kv4.2, and Kv4.3 protein levels were significantly reduced at 4 weeks (Kv1.4/Kv3.4 P<0.01; Kv4.2/4.3 P<0.05, n=6) and 8 weeks post-MI (Kv3.4/Kv4.2 P<0.05; Kv1.4/Kv4.3 P<0.01, n=6), but not at 1 week.