“…Yousuf and colleagues 11 reported an iASD measuring 1.1 cm that was identified in a patient who underwent cryoablation, followed 3 months later by RF ablation, and then presented a few days later with heart failure symptoms. There have also been previous reports of a large iASD identified intraprocedurally as a result of an ASD sizing balloon 12 and during a MitraClip procedure 13 …”