Long QT syndrome: KCNQ1, KCNH2, SCN5AShort QT syndrome: KCNH2, KCNQ1, SCLA4A, KCNJ2, CACNA1C, CACNB2Brugada syndrome: SCN5ACatecholaminergic polymorphic ventricular tachycardia: RYR2, CASQ2Idiopathic ventricular fibrillation: DPP6, KCNJ8, CACNA1C, CACNB2B, CACNA2D1, SCN5A, ACTN2Cardiac conduction disease: SCN5A, SCN5B, TRPM4, TNNI3KHypertrophic cardiomyopathy: MYBPC3, MYH7Dilated cardiomyopathy: TTN, LMNA, MYH7, TNNT2, FLNC, PLN, DSPArrhythmogenic right ventricular dysplasia (arrhythmogenic cardiomyopathy): PKP2, DSP, JUP, DSG2, DSC2. The gene discussed is TTN; the disease is polymorphic ventricular tachycardia.