title: [Second degree congenital block. Apropos of 2 cases without cardiopathy].
mesh_terms: D002675:Child, Preschool; D004452:Echocardiography; D004562:Electrocardiography; D006327:Heart Block / Q000151:congenital* / Q000175:diagnosis; D006801:Humans; D008297:Male
vernacular_title: Bloqueo congénito de segundo grado. A propósito de dos casos sin cardiopatía.