title: An unusual echo-free space between the great vessels and left atrium.
authors.affiliation: Department of Anesthesiology, Emory University School of Medicine, Atlanta, GA 30322, USA.
authors.forename: J S
authors.initials: JS
authors.lastname: Shanewise
mesh_terms: D000368:Aged; D001024:Aortic Valve Stenosis / Q000000981:diagnostic imaging* / Q000601:surgery; D015150:Echocardiography, Doppler; D017548:Echocardiography, Transesophageal; D005260:Female; D006325:Heart Atria / Q000000981:diagnostic imaging*; D006801:Humans; D011651:Pulmonary Artery / Q000000981:diagnostic imaging*