title: Defining frailty: "I know it when I see it".
authors.affiliation: Cardiac Surgical Services, Inova Health System, Falls Church, Va. Electronic address: aspeir1@gmail.com.
authors.forename: Alan
authors.initials: A
authors.lastname: Speir
mesh_terms: D000375:Aging; D006348:Cardiac Surgical Procedures / Q000009:adverse effects*; D003693:Delirium / Q000209:etiology*; D005260:Female; D016330:Frail Elderly; D006801:Humans; D008297:Male