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Stroke represents a major cause of morbidity and mortality despite significant progress in recent decades. In individuals under the age of 65, the etiologies of ischemic stroke (IS) are diverse, and management is well-established. Antiphospholipid syndrome (APS) accounts for 10 to 20% of the causes of stroke in this population. In elderly individuals, APS is not systematically investigated due to the predominance of embolic, atherosclerotic, and small vessel disease causes. However, delayed discovery of APS is not uncommon and is more frequently associated with the occurrence of arterial thrombosis. Moreover, the management of APS involves several challenges given the risk of recurrence of thrombosis and the potential association with conventional cardiovascular risk factors. The antithrombotic treatment consists of lifelong anticoagulation, excluding direct oral anticoagulants (DOACs) due to the risk of thrombotic recurrence. The main objective of the study will be to assess the prevalence of antibodies useful for the diagnosis of APS (Sapporo criteria) in individuals aged 65 or older hospitalized for an ischemic stroke (IS) or transient ischemic attack (TIA).
Furthermore, the classification of APS is likely to evolve in the coming years with the inclusion of new clinically relevant antibodies (anti-phosphatidylserine and anti-phosphatidylethanolamine) because of their strong association with the occurrence of thrombosis. Even though they are often associated with circulating anticoagulants, they are also found in 10% of APS cases negative for other antibodies.
Patient inclusion in the study should occur during the acute phase of the stroke, before the initiation of anticoagulant treatment.
Thus, after verifying the inclusion and exclusion criteria, patients will be informed and must sign the informed consent form if they agree to participate.
After inclusion, the research procedure will be as follows:
Conduct a unique immunological biological assessment with:
Data collection will include patient details, stroke/TIA details, biological data, and follow-up. As part of routine follow-up, patients will be seen in a neurological consultation at 6 months.
Clinical and biological data will be reviewed at the end of the study by two doctors (a neurologist and an internist) to confirm or exclude the APS diagnosis and its contribution to the neurological condition.
An internal medicine follow-up will be initiated for patients with confirmed APS, and an appropriate treatment will be proposed.
Full description
Stroke represents a major cause of morbidity and mortality despite significant progress in recent decades, particularly in acute-phase management. In 80% of cases, stroke is ischemic (IS), and the etiology and prognosis can vary depending on the patient's age. A comprehensive etiological workup allows for the adaptation of secondary prevention, thereby helping to reduce the risk of recurrence.
In individuals under the age of 65, etiologies of ischemic stroke (IS) are multiple, and management is well-established. In individuals under 50, antiphospholipid syndrome (APS) accounts for 10 to 20% of the causes of ischemic stroke, highlighting the importance of this etiology in younger patients. The diagnosis of IS/TIA related to APS relies on expert evaluation of clinical and biological data.
This syndrome is characterized by thrombosis in arterial or venous territories as well as the detection of specific antibodies (anti-cardiolipin antibodies, and/or anti-β2-glycoprotein type 1 antibodies, and/or circulating anticoagulants), with a cumulative risk of thrombosis depending on the number of antibodies identified. Historically, APS was associated with lupus and considered secondary, but it is now well accepted that it can occur in isolation and thus be primary.
APS is not systematically sought in elderly patients due to the predominance of cardioembolic, atherosclerotic, and small vessel disease causes. However, the late discovery of APS is not uncommon and is more frequently associated with arterial thrombosis. A retrospective study including a systematic search for APS in patients with IS found a significant association between older age and the presence of antiphospholipid antibodies (71 vs 66 years). Management presents several challenges due to the risk of recurrence of both arterial and venous thrombosis, as well as the potential association with conventional cardiovascular risk factors. Antithrombotic treatment involves lifelong anticoagulation, excluding direct oral anticoagulants (DOACs) such as Rivaroxaban due to the risk of thrombotic recurrence. A retrospective study also showed an association between APS and atrial fibrillation, reaching 30%. Atrial fibrillation, the prevalence of which increases with age, is increasingly treated with DOACs, suggesting the need to investigate APS in order to adapt the antithrombotic treatment and reduce the risk of recurrence.
Furthermore, the classification of APS is likely to evolve in the coming years with the inclusion of new clinically relevant antibodies, such as anti-phosphatidylserine and anti-phosphatidylethanolamine. These antibodies are strongly associated with the occurrence of thrombosis. Moreover, although these antibodies are strongly associated with circulating anticoagulants (which are difficult to detect due to the need for no anticoagulant treatment at the time of sample collection), they are also found in 10% of APS cases that are negative for other antibodies. With this study, we propose to systematically investigate these two antibodies as well.
Patient inclusion in the study should occur during the acute phase of the stroke, before the initiation of anticoagulant treatment.
Thus, after verifying the inclusion and exclusion criteria:
After inclusion, the research procedure will be as follows:
Conduct a unique immunological biological assessment with:
Data collection will include patient details (age, sex, etc.), stroke/TIA (location, etiology, etc.), biological data, and follow-up (recurrence, disability, and mortality during hospitalization and at 6 months). As part of routine follow-up, patients will be seen in a neurological consultation at 6 months.
Clinical and biological data will be reviewed at the end of the study by two doctors (a neurologist and an internist) to confirm or exclude the APS diagnosis and its contribution to the neurological condition.
An internal medicine follow-up will be initiated for patients with confirmed APS, and an appropriate treatment will be proposed.
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inclusion criteria :
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400 participants in 1 patient group
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Kévin DIDIER; Solène MOULIN
Data sourced from clinicaltrials.gov
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