Home Doctors Marietta Juan Guardela Dra. Marietta Juan Guardela Cardiology Adultos Schedule appointment (+57) 310 786 7896 Sobre mí Sobre mí Cardiology Specialist Credenciales Credenciales Specialist in Internal Medicine.Specialist in Cardiology from the Pontifical Javeriana University.Subspecialist in Echocardiography from the University of Rosario.