title: T-wave and QT-interval alternans?
authors.forename: John E
authors.initials: JE
authors.lastname: Madias
mesh_terms: D018880:Atrial Premature Complexes / Q000150:complications* / Q000175:diagnosis*; D001919:Bradycardia / Q000150:complications* / Q000175:diagnosis*; D003937:Diagnosis, Differential; D004562:Electrocardiography / Q000379:methods*; D006801:Humans