Mark Gajjar, M.D.. Southwest Texas Methodist Hospital 7700 Floyd Curl Dr. San Antonio, TX 78229 210 575 4666. Jorge Alvarez, M.D.. Texas Children's HospitalThere are two procedures to close a patent foramen ovale are cardiac catheterization and robotic surgical repair. A specialized, FDA-approved device can be used to close a hole in the heart, called an ASO, or "Amplatzer Septal Occluder." AMPLATZER™ PFO occluder (St. Table 1 Demographic, Clinical, and PFO Characteristics of Enrolled Patients With Complete Follow-Up. Robert A. Hull, Division of Cardiology, San Antonio Military. Jude Medical) for secondary prevention of stroke.