You will lie flat on your back in a dark room. Sorensen had been conducting PFO closures for nearly a decade and was considered one of the country's prominent practitioners.Most people with a patent foramen ovale don't need treatment. , Salt Lake City, USA. If you have a PFO and low blood oxygen levels or an unexplained stroke, you may need a procedure to close the hole. A patient with right ventricular infarction and severe hypoxemia secondary to right-to-left shunting through a patent foramen ovale is presented. A patient with right ventricular infarction and severe hypoxemia secondary to right-to-left shunting through a patent foramen ovale is presented. PARTICIPANTS Three hundred sixty-four consecutive rescue echocardiograms in the perioperative setting. We hypothesized that patent foramen ovale closure would not result in a demonstrated benefit in children. Methods. AbstractBackground: Migraine is a prevalent and disabling disorder.