When excluding the more prevalent TNNT2 and MYBPC3 variants in HCM G+P− individuals, the occurrence of ventricular arrhythmias (OR 1.72 [95% CI 0.44;4.89], P=0.306) and atrial arrhythmias (OR 1.43 [95% CI 0.84;2.32], P=0.156) was comparable to G−P− controls. The gene discussed is TNNT2; the disease is Ventricular arrhythmia.