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intraatrial septum and foramen ovale
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intraatrial septum and foramen ovale

What is a mobile intraatrial septum with patent foramen ovae and minimal right to left shunting?
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242509_tn?1196926198
There is a membrane that separates the two atria in the adult heart called the interatrial septum. If this moves more than 15 mm then is is described as a mobile IAS, and it is an important but not well studied risk factor for stroke. A PFO is a remnant of a fetal communication between the two atrial, and usually shifts blood from the left to the right atrial. If this flow has reversed then there is probably some pulmonary hypertension.
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