Migraine and hole in heart

According to the BBC News quoting research by doctors in London and Shrewsbury, there may be a link between migraine with aura and a hole in the heart. Their figures (quoted from the BBC article) are as follows…

“The latest study screened 432 migraine with aura patients, and found 24% had a moderate [or] large PFO - six times greater than the number found in the general population.”
I make that around 104 with a ‘hole in the heart’ from the screened sample compared with 17 from a similar sized sample of the rest of us. The good news is that a correction of the hole in the heart reduces the severity of the migraine in many cases. The doctors used an interesting measure of improvement: severity of headache multiplied by length.

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