title: Questioning guidelines in the ECG Puzzler.
authors.forename: Sandra
authors.initials: S
authors.lastname: Walden
mesh_terms: D000368:Aged; D004452:Echocardiography / Q000592:standards*; D006801:Humans; D017410:Practice Guidelines as Topic; D012015:Reference Standards; D017180:Tachycardia, Ventricular / Q000175:diagnosis*