Patent foramen ovale closure is a procedure to close a hole in the heart. We use minimally invasive approaches to treat PFO without open-chest surgery.In this heart surgery, the surgeon uses stitches to close the PFO . A PFO closure fills an opening between your heart's two upper chambers. The foramen ovale usually closes 6 months to a year after the baby's birth. PFO closure typically is a cardiac catheterization procedure. Patent foramen ovale closure can help reduce risk of another ischemic stroke. Learn more about a minimally-invasive treatment option.