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Updated: Jul 18, 2026

Closure of a Patent Foramen Ovale (PFO): An Intervention Sequence
Published on: December 23, 2022
[Thrombophilia and patent foramen ovale in young stroke patients]
F J Carod-Artal1, S Vilela Nunes, D Portugal
1Servicio de Neurología, Hospital Sarah Centro, Red Sarah de Hospitales de Rehabilitación, Brasilia DF. fjavier4644@terra.com.br
Insights
Patent foramen ovale (PFO) is a vascular risk factor in young stroke patients. Thrombophilia is not an additional risk factor for cryptogenic stroke in young patients with PFO.
Area of Science:
- Cardiovascular Medicine
- Neurology
- Genetics
Context:
- Patent foramen ovale (PFO) is a recognized vascular risk factor in young stroke patients.
- The role of thrombophilia in cryptogenic stroke with PFO remains unclear.
- This study investigates the prevalence of thrombophilia in young stroke patients with PFO.
Purpose:
- To determine the prevalence of thrombophilia in young stroke patients with PFO.
- To assess the association between PFO, thrombophilia, and cryptogenic stroke.
- To evaluate migraine prevalence in relation to PFO status.
Summary:
- A prospective study of 130 young stroke patients (mean age 34) found 32.3% had PFO.
- PFO was significantly more common in cryptogenic stroke patients (41%) compared to known etiology stroke patients (14.3%).
- Thrombophilia prevalence was similar across PFO-positive and PFO-negative groups, suggesting it's not an additional risk factor for cryptogenic stroke in PFO patients.
Impact:
- Findings suggest that thrombophilia does not contribute to the increased risk of cryptogenic stroke in young patients with PFO.
- This research helps refine risk stratification for young stroke patients.
- Understanding the interplay between PFO and thrombophilia is crucial for stroke prevention strategies.
Introduction:
Patent foramen ovale (PFO) is a vascular risk factor in young stroke patients.
Objective:
[corrected] We sought to analyze the prevalence of thrombophilia in young stroke patients with patent foramen ovale (PFO).
Methods:
Prospective study; a total of 130 consecutive young stroke patients (female: 58.5 %; mean age: 34; range: 15-45 years) consecutively admitted to the hospital during 2002-2003. All patients underwent a diagnostic protocol including echocardiogram, carotid echodoppler, transcranial doppler with bubble test, brain tomography scan or magnetic resonance imaging. Thrombophilia studies included fasting plasma levels of protein C, protein S, antithrombin III, lupus anticoagulant, anticardiolipin antibodies, lupus anticoagulant, antinuclear antibodies, and genetic testing for the factor V Leiden and C677T methylene tetrahydrofolate reductase mutations. Stroke subtype classification was done according to TOAST criteria.
Results:
Etiology of stroke was: cryptogenic (67 %), cardioembolism (14.6 %), large artery atherosclerosis (8.5 %), small vessel occlusion (3.8 %) and other causes (5.4 %). 42 patients (32.3 %) had a PFO; 41 % of cryptogenic stroke patients had a PFO while 14.3 % of known cause stroke patients had a positive PFO (p = 0.003; OR: 4.15; IC 95%: 1.47-12.29). 23.8 % of positive PFO patients (10/42) had migraine, while 9.1 % negative PFO patients suffered migraine (OR: 3.13; CI 95 %: 1.02- 9.69; p=0.023). Prevalence of thrombophilia in positive and negative PFO patients, in young with cryptogenic stroke and stroke patients with known etiology, and in cryptogenic stroke patients with and without PFO was similar.
Conclusions:
Thrombophilia does not seem to be an additional factor to the excess of risk observed in young patients with cryptogenic stroke and PFO.
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