title: An 89-year-old man presents with worsening heart failure.
authors.affiliation: Department of Cardiology, West Middlesex University Hospital, Isleworth, UK Academic Surgical Unit, St. Mary's Hospital, London, UK.
authors.forename: Gordon A G
authors.identifier: http://orcid.org/0000-0003-0338-3513
authors.initials: GA
authors.lastname: McKenzie
authors.affiliation: Department of Cardiology, West Middlesex University Hospital, Isleworth, UK Department of Cardiology, Hammersmith Hospital, London, UK.
authors.forename: Bradley
authors.initials: B
authors.lastname: Porter
authors.affiliation: Department of Cardiology, West Middlesex University Hospital, Isleworth, UK Department of Cardiology, Hammersmith Hospital, London, UK.
authors.forename: Raffi
authors.initials: R
authors.lastname: Kaprielian
mesh_terms: D000369:Aged, 80 and over; D000889:Anti-Arrhythmia Agents / Q000009:adverse effects*; D018450:Disease Progression; D004562:Electrocardiography / Q000187:drug effects; D005424:Flecainide / Q000009:adverse effects*; D006333:Heart Failure / Q000139:chemically induced*; D006801:Humans; D008297:Male
chemical_list: D000889:Anti-Arrhythmia Agents; D005424:Flecainide