Aortic stenosis in the background of a subaortic membrane and tunnel-like ventricular outflow tract septal hypertrophy.

7. Burashnikov E, Pfeiffer R, Barajas-Martínez H, et al. Mutations in the cardiac L-type calcium channel associated with inherited J-wave syndromes and sudden cardiac death. Heart Rhythm. 2010;7:1872--82. 8. Chopra N, Knollmann BC. Genetics of sudden cardiac death syndromes. Curr Opin Cardiol. 2011;26:196--203. 9. Watanabe H, Nogami A, Ohkubo K, et al. Electrocardiographic characteristics and SCN5A mutations in idiopathic ventricular fibrillation associated with early repolarization. Circ Arrhythm Electrophysiol. 2011;4:874--81. 10. Survivors of out-of-hospital cardiac arrest with apparently normal heart. Need for definition and standardized clinical evaluation. Consensus Statement of the Joint Steering Committees of the Unexplained Cardiac Arrest Registry of Europe and of the Idiopathic Ventricular Fibrillation Registry of the United States. Circulation. 1997;95:265--72. Margarita Dorantesa,∗, Roberto Marreroa, Annerys Méndezb, Jesús Castroa y Alfredo Vázqueza