FLAGSTAFF, Ariz. & MEXICO CITY--(BUSINESS WIRE)--W. L. Gore & Associates (Gore) today announced that Instituto Nacional De Cardiologia in Mexico City, Mexico, is the first hospital in the country to use the GORE® HELEX Septal Occluder for the transcatheter closure of an atrial septal defect (ASD). Department Chief, Dr. Carlos Zabal and Dr. Jose Garcia Montes of the Instituto Nacional de Cardiologia, in Mexico City, achieved the milestone procedure in March, 2010. Three separate and successful ASD closures were completed, giving the hospital the honor of becoming the first in Mexico to use the GORE HELEX Septal Occluder.