title: Isolated halo sign in the middle of the left atrium.
authors.forename: S
authors.initials: S
authors.lastname: Dagdelen
authors.forename: N
authors.initials: N
authors.lastname: Eren
authors.forename: C
authors.initials: C
authors.lastname: Alhan
mesh_terms: D000368:Aged; D000783:Aneurysm / Q000000981:diagnostic imaging*; D018618:Echocardiography, Doppler, Color / Q000379:methods; D005260:Female; D006325:Heart Atria; D006344:Heart Septal Defects, Atrial / Q000000981:diagnostic imaging*; D006350:Heart Valve Prosthesis; D006801:Humans; D008946:Mitral Valve Stenosis / Q000601:surgery; D011183:Postoperative Complications / Q000000981:diagnostic imaging / Q000209:etiology*