platelets and migraine in patent foramen ovale

Conditions: Platelet Aggregation, Spontaneous; Migraine With Aura; Patent Foramen Ovale

Summary: migraine is a common, chronic neurovascular disorder characterized by attacks of severe headache, autonomic nervous system dysfunction and, in some patients, aura, and disabling neurological symptoms. worldwide, migraine prevalence is as high as 18% in the general population. increased frequency of patent foramen ovale (pfo) in migraineurs was first reported in 1998 in a case-control study. since then, others have described a 60% prevalence of pfo in patients suffering from migraine with aura. the presence of a right-to-left shunt (rls) is thought to be a potent trigger of migraine attacks, although the mechanism is unknown. moreover, pfo closure has correlated with improved migraine symptoms in several retrospective uncontrolled studies. the aim of this single-center, prospective study is to assess the impact of pfo closure on migraine attacks over time together with evaluation of potential predictive risk factors.

the study will evaluate the results of approximately 100 subjects from a single center study registered in this trial. subjects who experienced transient ischemic attack (tia) or stroke with a clinical indication to pfo closure and symptomatic for migraine with/o aura are considered for a migraine score analysis at baseline before pfo closure and during the subsequent follow-up (fu) at 6 and 12-months, together with lab evaluation for platelet reactivity tests (p selectin, thromboxane b2), prostaglandin e1 and 2 (pge1, pge2), serotonin, cytokines and prostaglandin pge1 urinary metabolite run under aspirin therapy. the research questions are as follows: does the presence of a large pfo have any impact on migraine with aura? do migraineurs with aura and pfo have higher biomarkers of platelet activation than control patients? and are they at higher risk of stroke and tia recurrences based on high on clopidogrel platelet reactivity? what is the effect of pfo severity on monthly migraine frequency and aura frequency? what is the result of pfo closure in migraineur patients with pfo? do migraine with aura patients with large pfo have higher platelet activation and better migraine resolution after pfo closure?

Eligibility criteria:
inclusion criteria: * patients older than 18 years with more than 2 criteria: * previous stroke or tia (transient ischemic attack) * positive mri for ischemic events - * pfo with a baseline r-l shunt \> 10 microembolic signals (mes) and \> 20 mes during/after valsalva manoeuver * atrial septal aneurysm (asa) or residual chiari network or eustachian valve * positive thrombophilic screening (mthfr/prot c/prot s) * ability to sign the informed consent for the study participation exclusion criteria: * patients older than 70 years * paroxysmal atrial fibrillation * carotid, vertebral or basilar artery stenosis\> 50% on duplex imaging * inadequate temporal bone windows (signals) for transcranial doppler insonation * medication overuse headache * history of cognitive dysfunction, epilepsy, brain injury * use of continuous positive airway pressure (cpap) within 6 months of study enrollment * left ventricular ejection fraction (lvef) \< 30% * moderate/severe mitral valve regurgitation * known allergy to aspirin * known allergy to nickel * severe chronic kidney disease (gfr \< 30 ml/min) * beck depression inventory score \> or= 29 * state-trait anxiety inventory score exceeding cut-off for are and sex keywords: pfo, migraine, migraine with aura, aura, platelets

Keywords: migraine; pfo platelet reactivity aura