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A persistent opening in the atrial septum after birth. While a normal part of fetal circulation, the foramen ovale should close once the newborn begins breathing and the pressure in the left atrium exceeds that of the right atrium. While a PFO is generally asymptomatic, it can lead to the passage of clots from the venous circulation into the artierial circulation, resulting in paradoxical emboli, and possible strokes.
Biomarker and diagnostic research for patent foramen ovale has been reported in the published literature.
40 clinical trials registered, 14 recruiting. Interventions under study include medical devices, other interventions, drug therapy, and procedural interventions. Pipeline includes 4 PHASE3, 18 NA. Research is sponsored by a mix of industry and academic institutions.
NCT ID | Title | Phase | Sponsor | Status |
|---|---|---|---|---|
[NCT07172464](https://clinicaltrials.gov/study/NCT07172464) |
Data assembled from 4 of 12 sources · Last updated Sep 19, 2026, 2:53 PM UTC
European rare disease database
Early Feasibility Study (EFS) Evaluating Percutaneous Repair of the Atrial Septum With a Novel PFO Occluder: The PROTEA-PFO Study |
NA |
Recross Cardio, Inc. |
RECRUITING |
[NCT07519876](https://clinicaltrials.gov/study/NCT07519876) | Pulmonary Embolism and Right-to-Left Shunts | — | Tufts Medical Center | RECRUITING |
[NCT06953622](https://clinicaltrials.gov/study/NCT06953622) | Establishment of a Clinical and Prognostic Follow-up Cohort of Migraine Patients With Patent Foramen Ovale | — | Peking University Third Hospital | RECRUITING |
[NCT06120270](https://clinicaltrials.gov/study/NCT06120270) | CeraFlex PFO Closure System PMCF Study | — | Lifetech Scientific (Shenzhen) Co., Ltd. | RECRUITING |
[NCT07420400](https://clinicaltrials.gov/study/NCT07420400) | Non-Invasive Detection of Right-to-Left Cardiac Shunts | — | Scripps Health | RECRUITING |
327 publications have been identified in PubMed for patent foramen ovale. Kisho has analyzed 109 by research type. Research spans Review / Meta-Analysis (43%), Clinical Trial Publication (14%), and Epidemiology / Natural History (14%).
Research Type | Count | % of Total |
|---|---|---|
Research summaries | 47 | 43% |
Clinical study results | 15 | 14% |
Disease patterns and progression | 15 | 14% |
Other research | 9 | 8% |
Patient case studies | 9 | 8% |
Testing and diagnosis research | 7 | 6% |
Laboratory research | 6 | 6% |
New treatment approaches | 1 | 1% |
Fernandez-Cisneros A (2026). [PMID: 40826946](https://pubmed.ncbi.nlm.nih.gov/40826946/). *Med Gas Res*. [Case Report / Case Series]
Mohammad A (2026). [PMID: 42191285](https://pubmed.ncbi.nlm.nih.gov/42191285/). *Card Electrophysiol Clin*. [Review / Meta-Analysis]
Wilmshurst P (2026). [PMID: 42176897](https://pubmed.ncbi.nlm.nih.gov/42176897/). *Clin Med (Lond)*. [Review / Meta-Analysis]
Dong Y (2026). [PMID: 41547485](https://pubmed.ncbi.nlm.nih.gov/41547485/). *J Stroke Cerebrovasc Dis*. [Review / Meta-Analysis]
Grodzka O (2026). [PMID: 41090556](https://pubmed.ncbi.nlm.nih.gov/41090556/). *Headache*. [Review / Meta-Analysis]
Shah AH (2026). [PMID: 41530876](https://pubmed.ncbi.nlm.nih.gov/41530876/). *Eur Heart J Cardiovasc Imaging*. [Other]
Khan A (2026). [PMID: 41999292](https://pubmed.ncbi.nlm.nih.gov/41999292/). *Expert Rev Cardiovasc Ther*. [Review / Meta-Analysis]
Markus HS (2026). [PMID: 42175744](https://pubmed.ncbi.nlm.nih.gov/42175744/). *Int J Stroke*. [Other]
Hexdall EJ (2026). [PMID: 28613763](https://pubmed.ncbi.nlm.nih.gov/28613763/). *Unknown Journal*. [Clinical Trial Publication]
Suri R (2026). [PMID: 42092276](https://pubmed.ncbi.nlm.nih.gov/42092276/). *J Surg Res*. [Clinical Trial Publication]
AI-curated news mentioning patent foramen ovale
Updated Aug 20, 2026
A new study explores the complexities of thrombus in transit through a patent foramen ovale, highlighting its clinical implications. This research contributes to the understanding of potential risks associated with this condition.
A case report highlights platypnea-orthodeoxia syndrome resulting from a patent foramen ovale and interatrial septal aneurysm. This discovery adds to the understanding of the syndrome's underlying mechanisms.
A recent study highlights the occurrence of thrombus in transit across a patent foramen ovale, leading to dynamic embolism affecting both the left main coronary and pulmonary arteries. This research adds to the understanding of embolic events associated with congenital heart defects.