Funnel-Type Patent Foramen Ovale Morphology on 3D Echocardiography: A Novel High-Risk Anatomic Feature

Prior events are highly correlated with funnel-type PFO, particularly when RA opening area exceeds 15.85 mm². This geometry may act as an embolic "catchment" and favour in-situ thrombosis due to disturbed flow from the wide RA inlet to the narrow tunnel exit. Integration of 3D-TEE morphology with systemic risk factors such as smoking and dyslipidemia may refine patient stratification and guide management.