However, there was no significant difference in the expressions of mRNAs of PPP3CB (aortic valve disease, n = 6, normal subjects, n = 6; 17.13±0.49 vs. 16.02±0.19, P = 0.150), PLCE1 (aortic valve disease, n = 7, normal subjects, n = 6; 17.10±0.34 vs. 17.16±0.42, P = 0.886) and MEF2C (aortic valve disease, n = 7, normal subjects, n = 5; 17.37±0.34 vs. 17.82±0.36, P = 0.685) in the left atrial free wall between patients with aortic valve disease and normal subjects. The gene discussed is MEF2C; the disease is aortic valve disorder.