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Closure of a Patent Foramen Ovale (PFO): An Intervention Sequence
Published on: December 23, 2022
Patent foramen ovale and its relationship to stroke
1Department of Neurology, University of California, Irvine Medical Center, University of California, Irvine, 101 The City Drive South, Orange, CA 92868-4280, USA. scramer@uci.edu
Cardiology Clinics
|January 29, 2005
Insights
Patent foramen ovale is linked to stroke, especially cryptogenic stroke, through paradoxical embolism. This condition involves a blood clot traveling through an abnormal opening between heart chambers.
Area of Science:
- Cardiology
- Neurology
- Vascular Medicine
Background:
- Patent foramen ovale (PFO) is an atrial septal defect present in a significant portion of the adult population.
- Cryptogenic stroke, stroke of unknown origin, accounts for a substantial percentage of all ischemic strokes.
- Paradoxical embolism, where an embolus travels from the venous to the arterial circulation, is a suspected mechanism in PFO-related strokes.
Purpose of the Study:
- To explore the association between patent foramen ovale and the occurrence of stroke.
- To elucidate the role of paradoxical embolism as a causative factor in cryptogenic stroke.
- To review current understanding and evidence linking PFO to cerebrovascular events.
Main Methods:
- Literature review of studies investigating PFO and stroke.
- Analysis of case reports and clinical trials focusing on cryptogenic stroke etiology.
- Examination of diagnostic criteria and imaging techniques for PFO detection.
Main Results:
- Evidence suggests a higher prevalence of PFO in patients with cryptogenic stroke compared to the general population.
- Paradoxical embolism is a plausible mechanism explaining stroke in individuals with PFO.
- The presence of PFO may increase the risk of recurrent stroke in certain patient subgroups.
Conclusions:
- Patent foramen ovale represents a potential risk factor for cryptogenic stroke.
- Further research is warranted to refine risk stratification and treatment strategies for PFO-associated strokes.
- Closure of PFO may be considered in select patients to prevent recurrent cerebrovascular events.
Abstract:
This article discusses the relationship between patent foramen ovale and stroke, particularly in reference to paradoxical embolism as a cause of cryptogenic stroke.
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