Ages at AF diagnosis were as follows: 44 years (IQR, 36-55 years) for TTN, 48 years (IQR, 29-53 years) for MYH7, 43 years (IQR, 36-56 years) for MYH6, 52 years (IQR, 41-52 years) for LMNA, and 43 years (IQR, 29-57 years) for KCNQ1. The gene discussed is TTN; the disease is atrial fibrillation.