Of note, the expression of ROCK2 in the myolytic left atrial myocytes of the MR AF patients (5783291.5 ± 745382.4 vs. 1635719.8 ± 465425.9, p = 0.009) and the MR sinus patients (3981370.8 ± 457612.4 vs. 1635719.8 ± 465425.9, p = 0.011) were significantly higher than the expression of ROCK2 in the myolytic left atrial myocytes of the normal control subjects (Figs. 4 and 5). The gene discussed is ROCK2; the disease is miotic rate.