While generally rare, PFO closure procedures carry certain potential risks. These may include the perforation or tearing of heart and vascular walls, which can occur due to the closure device or guidewires. The device might also cause damage to adjacent heart tissues, potentially necessitating surgical correction. In some cases, the device could become dislodged within the heart chambers, requiring surgical intervention. Post-procedure, rare complications include infections, which would require antibiotic treatment. Infrequently, blood clots may form on the closure device, very rarely leading to a stroke. Additionally, heart rhythm disturbances (arrhythmias) can develop both during and after the procedure.