Eustachian valve, interatrial shunt, and paradoxical embolism

Area of Science:

• Cardiology
• Neurology
• Vascular Biology

Background:

• Patent oval foramen (PFO) closure is effective for cryptogenic stroke secondary prevention.
• The Eustachian valve (EV) is typically an incidental finding.
• A prominent EV is more common in PFO patients with cryptogenic stroke.

Purpose of the Study:

• To investigate the pathophysiological role of the Eustachian valve in cryptogenic stroke.
• To determine if the Eustachian valve is an independent risk factor for paradoxical embolism.
• To assess the impact of the Eustachian valve on outcomes after percutaneous PFO closure.

Main Methods:

• Review of randomized clinical trials on PFO closure.
• Analysis of Eustachian valve prevalence in patients with PFO and cryptogenic stroke.
• Evaluation of Eustachian valve association with adverse outcomes post-intervention.

Main Results:

• Persistent Eustachian valves are significantly more prevalent in patients with PFO and cryptogenic stroke.
• Prominent Eustachian valves are associated with adverse outcomes after percutaneous PFO closure.
• The Eustachian valve may impede spontaneous PFO closure and promote paradoxical embolism.

Conclusions:

• The Eustachian valve may not be an incidental finding but an adjunctive risk factor for paradoxical embolism in PFO patients.
• Eustachian valve presence may identify patients who benefit most from PFO intervention.
• Risk prediction models increasingly incorporate the Eustachian valve for identifying high-risk individuals.