title: Patent foramen ovale with right-to-left shunting: echocardiographic alternatives.
authors.forename: J D
authors.initials: JD
authors.lastname: Thomas
mesh_terms: D006348:Cardiac Surgical Procedures; D015150:Echocardiography, Doppler; D017548:Echocardiography, Transesophageal; D006346:Heart Septum / Q000000981:diagnostic imaging / Q000601:surgery*; D006439:Hemodynamics / Q000502:physiology; D006801:Humans; D014586:USSR; D014481:United States