There is a common heart abnormality known as a patent foramen ovale (PFO). This is a small hole in the heart and researchers have been studying this hole for may years. One thing they found about the PTO is that those who have this hole and need it closed have a positive side effect: when the hole is closed the individual no longer gets continuous migraine headaches.
But a researcher who has studied the issue for almost a decade tells WebMD that the jury is still out on the treatment.
In the new study, patients with PFOs who had a minimally invasive catheter-based procedure to close the small hole in their heart had significantly fewer disabling migraines than patients with PFOs who did not have the procedure. As many as one in four people have a PFO abnormality, but most never know it.
Prior to birth, everyone has the small opening, which exists to divert blood away from undeveloped lungs. Normally, the hole closes after birth, but in some people the closure is not complete.
While not everyone with PFOs has migraines and not everyone with migraines has PFOs, studies show that migraine sufferers are far more likely to have the heart abnormality than people without migraines.
PFO researcher Peter Wilmshurst, MB, of the UK’s Royal Shrewsbury Hospital, tells WebMD that about half of patients with a specific type of migraine known as migraine with aura have large PFOs or similar openings in their hearts compared to about 5% of the population at large.
Wilmshurst did not participate in the new study, but he was involved in an earlier study that examined PFO closure as a treatment for migraines. Published last year, that study, known as the MIST trial, found no benefit for the treatment.
The new study included 82 migraine patients who had large PFOs and no history of strokes. All the patients also had a type of brain lesion that is commonly seen in brain scans of patients with migraines.
Fifty-three of the patients had the PFO closure procedure and 29 did not.
At six months follow-up, the PFO closure patients showed significant improvements in both the frequency and severity of their migraine headaches.
In all, 53% of patients in the PFO closure group reported a disappearance of disabling headaches, compared to 7% of the patients who did not have the closure procedure; 87% in the closure group reported a more than 50% reduction in total headaches, compared to 21% of the patients in the comparison group.
The study appears in the Feb. 24 issue of the Journal of the American College of Cardiology.
“Only patients in the closure group reported a significant reduction of migraine severity, which is crucial for quality of life,” study researcher Carlo Vigna, MD, and colleagues write. “In contrast, the number of disabling attacks did not change or increased in 41% of controls.”
Tags: headaches, migraines, PFO
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