title: Editor's perspective: the Isthmus of uncertainty.
authors.affiliation: Division of Cardiovascular Diseases, Departments of Medicine and Pediatrics and Adolescent Medicine, Mayo Clinic, Rochester, MN.
authors.forename: Samuel J
authors.initials: SJ
authors.lastname: Asirvatham
authors.forename: William G
authors.initials: WG
authors.lastname: Stevenson
mesh_terms: D001282:Atrial Flutter / Q000209:etiology*; D019918:Heart Valve Prosthesis Implantation / Q000009:adverse effects*; D006801:Humans; D008297:Male; D008946:Mitral Valve Stenosis / Q000601:surgery*; D013617:Tachycardia, Supraventricular / Q000209:etiology*
keywords: atrial flutter