1 Electrophysiology Department, National Institute of Cardiology 'Ignacio Chávez', Juan Badiano 1, Col. Sección XVI, Mexico City, DF 14080, Mexico [email protected].
2 Electrophysiology Department, National Institute of Cardiology 'Ignacio Chávez', Juan Badiano 1, Col. Sección XVI, Mexico City, DF 14080, Mexico.