The practice advisory, which updates a previous AAN guideline, is published in the July 27, 2016, online issue of the journal Neurology.
To develop the advisory, researchers reviewed all available scientific studies on people with PFO who also had an ischemic stroke or a transient ischemic attack (TIA).
“Compared with other ways to prevent a second stroke, such as medications to reduce blood clots, the devices used to close a patent foramen ovale have limited evidence to support their use,” said practice advisory author Steven R. Messé, MD, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania. “It’s still uncertain how effective these devices are in reducing stroke risk, and the procedure is associated with uncommon but potentially serious complications.”
In addition, Dr. Messé noted that the devices used for PFO closure are not available for routine use in the United States, so the procedure must be done off-label with a device approved for treating a similar heart defect or with another device that does not have strong evidence regarding its use. At the time of publication, the US Food and Drug Administration (FDA) is currently reviewing the one device that has the best evidence regarding closure.
“People should know that having a PFO is common -- 1 in 4 people have one -- and the risk of having a second stroke is low,” said Dr. Messé. (Well shit, Dr. Messé you are not the person at risk for a stroke.You can blithely talk about it without consequence.)
When the AAN developed the earlier guideline on this topic in 2004, not enough evidence was available to make a recommendation on whether closing a PFO was effective in reducing stroke risk.
The advisory also recommends that aspirin or other antiplatelet drugs be used to prevent blood clots instead of blood thinners unless there is another reason to use blood thinners, such as a person with a history of blood clots in the legs or lungs.
SOURCE: American Academy of Neurology