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. 2018 Dec 11;91(24):e2202-e2210.
doi: 10.1212/WNL.0000000000006650. Epub 2018 Nov 14.

Migraine with visual aura is a risk factor for incident atrial fibrillation: A cohort study

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Migraine with visual aura is a risk factor for incident atrial fibrillation: A cohort study

Souvik Sen et al. Neurology. .

Abstract

Objective: Migraine with visual aura is associated with cardioembolic stroke risk. The aim of this study was to test association between migraine with visual aura and atrial fibrillation (AF), in the Atherosclerosis Risk in Communities study.

Methods: In the Atherosclerosis Risk in Communities study, a longitudinal, community-based cohort study, participants were interviewed for migraine history in 1993-1995 and were followed for incident AF through 2013. AF was adjudicated using ECGs, discharge codes, and death certificates. Multivariable Cox proportional hazards models were used to study the relation between migraine and its subtypes with incident AF, compared with controls without headaches. Mediation analysis was conducted to test whether AF was a mediator of migraine with visual aura-associated stroke risk.

Results: Of 11,939 participants assessed for headache and without prior AF or stroke, 426 reported migraines with visual aura, 1,090 migraine without visual aura, 1,018 nonmigraine headache, and 9,405 no headache. Over a 20-year follow-up period, incident AF was noted in 232 (15%) of 1,516 with migraine and 1,623 (17%) of 9,405 without headache. After adjustment for multiple confounders, migraine with visual aura was associated with increased risk of AF compared to no headache (hazard ratio 1.30, 95% confidence interval 1.03-1.62) as well as when compared to migraine without visual aura (hazard ratio 1.39, 95% confidence interval 1.05-1.83). The data suggest that AF may be a potential mediator of migraine with visual aura-stroke risk.

Conclusions: Migraine with aura was associated with increased risk of incident AF. This may potentially lead to ischemic strokes.

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Figures

Figure 1
Figure 1. Kaplan-Meier curves depicting 20-year outcome of incident atrial fibrillation in participants with migraine headache and those without headache
Inset: log rank p value.
Figure 2
Figure 2. Kaplan-Meier curves depicting 20-year outcome of incident atrial fibrillation in participants with migraine with visual aura and those with migraine without aura
Inset: crude and adjusted hazard ratios (HRs) along with 95% confidence intervals (CIs) are indicated in the left bottom. Log rank p value is indicated in the right bottom.

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