Intracardiac shunting across a patent foramen ovale may exacerbate hypoxemia in high-altitude pulmonary edema.
Levine BD, Grayburn PA, Voyles WF, Greene ER, Roach RC, Hackett PH. Intracardiac shunting across a patent foramen ovale may exacerbate hypoxemia in high-altitude pulmonary edema. Ann Intern Med. 1991 Apr 01; 114(7):569-70.