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    • Migraine with visual...

    Migraine with visual aura increases risk for irregular heartbeat

    Written by Medha Baranwal Baranwal Published On 2018-11-16T19:28:33+05:30  |  Updated On 16 Nov 2018 7:28 PM IST
    Migraine with visual aura increases risk for irregular heartbeat

    USA: Migraine with visual aura is associated with an increased risk of atrial fibrillation (irregular heartbeat), according to a new study published in the journal Neurology. The condition of migraine with visual aura is characterized by disturbances in vision right before beginning of a headache. The disturbances include having blurry vision or blind spots, or seeing wavy lines or flashes of light.


    Atrial fibrillation is a form of arrhythmia in which the heart's normal rhythm is out of sync. This might result in pooling of blood in the heart, forming clots that may go to the brain, causing a stroke.


    Migraine with visual aura is associated with cardioembolic stroke risk. Souvik Sen, the University of South Carolina in Columbia, and colleagues aimed to test the association between migraine with visual aura and atrial fibrillation (AF), in the Atherosclerosis Risk in Communities study.


    "Since atrial fibrillation is a common source of strokes caused by blood clots, and previous research has shown a link between migraine with aura and stroke, we wanted to see if people who have migraine with aura also have a higher rate of atrial fibrillation," said Dr. Sen. "Atrial fibrillation can be managed through medication, but many people do not realize that they have atrial fibrillation."


    For the study, 11,939 people with an average age of 60 without prior atrial fibrillation or stroke were evaluated for headache. Of those 9,405 did not have headache and 1,516 had migraine. Of those who had migraine, 426 had migraine with visual aura. The participants were followed for up to 20 years.


    During the study, 1,623 people without headache, or 17 percent, developed atrial fibrillation while 80 of 440 people with migraine with aura, or 18 percent, developed the condition and 152 of 1,105 people with migraine without aura, or 14 percent.


    Key Findings:

    • 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 adjusting for age, sex, blood pressure, smoking and other factors that could affect risk of atrial fibrillation, people with migraine with aura were found to be 30 percent more likely to develop the condition than people who did not have headaches and 40 percent more likely to develop atrial fibrillation than people with migraine with no aura

    • The data suggest that AF may be a potential mediator of migraine with visual aura–stroke risk.

    • The rate of stroke in the migraine with aura group was four out of 1,000 people annually compared to two out of 1,000 people annually in those with migraine without aura, and three of 1,000 people annually in those with no headache.


    The results translate to an estimated nine out of 1,000 people with migraine with aura having atrial fibrillation compared to seven out of 1,000 people with migraine without aura. Researchers also found that the rate of stroke in the migraine with aura group was four out of 1,000 people annually compared to two out of 1,000 people annually in those with migraine without aura, and three of 1,000 people annually in those with no headache.


    "Our research suggests that atrial fibrillation may play a role in stroke in those with migraine with visual aura," said Sen. "It is important to note that people with migraine with aura may be at a higher risk of atrial fibrillation due to problems with the autonomic nervous system, which helps control the heart and blood vessels. More research is needed to determine if people with migraine with visual aura should be screened for atrial fibrillation."


    A limitation of the study was that the definition of migraine may have left out people who had migraines that lasted less than one year or who had a history of migraine at younger ages. There was also limited information on migraine medications that may influence heart rate.


    Based on the findings, the authors concluded that migraine with aura was associated with increased risk of incident AF. This may potentially lead to ischemic strokes.


    For further reference follow the link: https://doi.org/10.1212/WNL.0000000000006650
    clotsHeadacheHeart beatheart rateischemicmigraineneurologyriskSouvik Senstrokevisual aura
    Source : With inputs from Neurology

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    Medha Baranwal Baranwal
    Medha Baranwal Baranwal
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