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Migraines are not directly caused from having an enlarged heart, however - the major cause of an enlarged heart is high blood pressure. Hypertension can cause increased migraine frequency and severity. Another heart condition that can cause migraines is Patent Foramen Ovale. A foramen ovale is a small hole in the heart that everyone has before they are born. Under normal circumstances it closes. For those that don't, the patent foramen ovale works like a valve - only opening when the heart is under stress. An enlarged heart is always under stress. Initial studies have shown that surgery for closing a PFO has improved the frequency of migraine headaches in those patients.

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Q: Are migraines a side effect of having an enlarged heart?
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