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Updated: May 4, 2026

Closure of a Patent Foramen Ovale PFO: An Intervention Sequence
Published on: December 23, 2022
Current evidence for closure of a patent foramen ovale for cryptogenic stroke prevention
Insights
Patent foramen ovale closure may be a viable option for cryptogenic stroke prevention. This review examines recent trials comparing PFO closure to medical therapy for secondary stroke prevention.
Area of Science:
- Cardiology
- Neurology
- Medical Devices
Background:
- Patent foramen ovale (PFO) is associated with cryptogenic stroke (CS), a significant cause of ischemic stroke.
- The efficacy of PFO closure versus medical therapy for secondary stroke prevention remains under investigation.
Purpose of the Study:
- To review and compare evidence on percutaneous PFO closure against medical therapy for secondary stroke prevention.
- To analyze recent randomized controlled trials (RCTs) in this field.
Main Methods:
- Literature review focusing on comparative studies of PFO closure and medical therapy.
- Analysis of three recent randomized controlled trials (RCTs).
Main Results:
- Evidence comparing PFO closure to medical therapy for secondary stroke prevention is still evolving.
- Recent RCTs provide critical data for evaluating treatment strategies.
Conclusions:
- Further research and analysis of RCTs are necessary to determine the optimal secondary prevention strategy for patients with PFO and CS.
- The role of PFO closure in stroke prevention requires continued evaluation in light of new evidence.
Abstract:
A patent foramen ovale (PFO) has long been implicated as a potential mechanism for cryptogenic stroke (CS), which accounts for up to 40% of all cases of ischaemic stroke. Although there is a strong association between a PFO and CS, there is less evidence that percutaneous closure of the defect, as opposed to medical therapy with antithrombotics or anticoagulants, is the most effective form of secondary prevention. The aim of this review is to examine the evidence comparing percutaneous closure with medical therapy, with a particular focus on three recently published randomised controlled trials.
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