The pathways for hypertrophic cardiomyopathy (P = 0.005), TGF-β signalling (P = 0.006), and dilated cardiomyopathy (P = 0.008) contained genes for integrins, IGF-1 and TGF-β2 and -β3. This evidence concerns the gene IGF1 and hypertrophic cardiomyopathy.