MYH7 and hypertrophic cardiomyopathy: In addition, 9 of the 40 genes associated with DMRs in the hypertrophic cardiomyopathy ontology express myosin heavy chain genes, including 2 that are critical for heart function and development, myosin heavy peptide 6 alpha (Myh6) and myosin heavy peptide 7 beta (Myh7; Table 4).