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High-risk PFO score calculator (modified from Nakayama et al.4)
| Variables | Point |
|---|---|
| Long-tunnel PFO ≥ 10 mm | 1 |
| Hypermobile interatrial septum | 1 |
| Eustachian valve or Chiari’s network | 1 |
| Large RL shunt during Valsalva maneuver | 1 |
| Low-angle PFO ≤ 10° | 1 |
