Francisco-Javier Roldán1
, Jesús Vargas-Barrón1
, Clara Vázquez-Antona1
, Luis Muñoz Castellanos2
, Julio Erdmenger-Orellana1
, Ángel Romero-Cárdenas1
and Marco-Antonio Martínez-Ríos3 
1
Echocardiography department. Instituto Nacional de Cardiología "Ignacio Chávez", Mexico City, Mexico
2
Embryology department. Instituto Nacional de Cardiología "Ignacio Chávez", Mexico City, Mexico
3
Catheterization laboratory. Instituto Nacional de Cardiología "Ignacio Chávez", Mexico City, Mexico