However, the expression of ROCK2 in the non-myolytic left atrial myocytes of the MR AF patients (3608241.7 ± 720425.7 vs. 2044794.5 ± 422720.6, p = 0.386) and the MR sinus patients (2208837.8 ± 624203.5 vs. 2044794.5 ± 422720.6, p = 0.612) did not significantly differ from the expression of ROCK2 in the non-myolytic left atrial myocytes of the normal control subjects (Fig. 4). This evidence concerns the gene ROCK2 and miotic rate.