Journal of interventional cardiology
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Comparative Study
Transcranial Doppler quantification of residual shunt after percutaneous patent foramen ovale closure. Comparison of two devices.
Recurrent paradoxical embolism after catheter-based closure of right-to-left shunt (RLS) can be related to residual RLS. To improve closure success, we need a better understanding of the anatomic and device-related factors associated with closure efficacy. ⋯ (1) Both noncentering and central occluding closure devices effectively reduce RLS after PFO closure. (2) Large PFO defects with or without ASA have lower residual shunt grades at 3 months when closed by central occluding devices.