title: Response.
authors: UNAM, Experimental Medicine Mexico, Distrito Federal, Mexico. lmolina@unam.mx.
authors: Luis
authors: L
authors: Molina
mesh_terms: D054537:Atrioventricular Block / Q000175:diagnosis* / Q000628:therapy*; D002304:Cardiac Pacing, Artificial / Q000379:methods*; D005260:Female; D006346:Heart Septum; D006352:Heart Ventricles; D006801:Humans; D008297:Male