Calcium signaling pathway; MAPK signaling pathway; cardiac muscle contraction; Adrenergic signaling in cardiomyocytes; Oxytocin signaling pathway; hypertrophic cardiomyopathy (HCM); arrhythmogenic right ventricular cardiomyopathy (ARVC); dilated cardiomyopathy. The gene discussed is OXT; the disease is hypertrophic cardiomyopathy.