Shah, Sandy Patent foramen ovale. Echoes from the past and questions for the future. [electronic resource] - New Jersey medicine : the journal of the Medical Society of New Jersey Jun 2002 - 25-6 p. digital Publication Type: Journal Article ISSN: 0885-842X Subjects--Topical Terms: Heart Septal Defects, Atrial--complicationsHumansUltrasonography