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Updated: Apr 8, 2026

Closure of a Patent Foramen Ovale PFO: An Intervention Sequence
Published on: December 23, 2022
Early malfunction of polyvinyl alcohol membrane of septal occluder
Mehmet G Ramoğlu1, Tayfun Uçar2, Ercan Tutar3
1Department of Pediatric Cardiology, Fellow in Pediatric Cardiology, Ankara University, Medical School, Ankara, Turkey.
Abstract:
Percutaneous device closure of atrial septal defect (ASD) is now considered the choice of treatment. Numerous devices with advantages/disadvantages are currently available and under development. Cardia Ultrasept II ASD occluder has a nitinol frame covered with polyvinyl alcohol (PVA) membrane. Here, a well-documented case of early malfunction of PVA membrane detected in the first week of implantation in a 4-year-old male patient, who underwent an uneventful device closure with 20 mm Cardia Ultrasept II ASD Occluder, is presented. One week after implantation left-to-right shunt through the device was detected and the explantation of device revealed PVA membrane with multiple perforations.
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