title: Distribution of first-detected atrial fibrillation patients without structural heart diseases in symptom classifications.
abstract: BACKGROUND
  The characteristics and prognosis of patients with first-detected atrial fibrillation (AF) in Japan remain unclear.
  
  
  RESULTS
  First-detected AF patients without structural heart disease (n=289) were reviewed with regard to 2 symptom classifications (CCS-SAF and EHRA). In both classifications, asymptomatic patients comprised ≈40% of the patients, and patients in the most symptomatic class (≈6%) had peculiar characteristics and poor prognosis. In other symptomatic classes, symptoms affected the treatment strategy without a significant difference in the patients' backgrounds and prognosis.
  
  
  CONCLUSIONS
  This is the first report to describe the distribution, characteristics and outcomes of first-detected AF patients according to symptom classifications.
authors.affiliation: Department of Cardiology, The Cardiovascular Institute, 3-2-19 Nishiazabu, Minato-ku, Tokyo 106-0031, Japan. swcqg251@yahoo.co.jp
authors.forename: Keitaro
authors.initials: K
authors.lastname: Senoo
authors.forename: Shinya
authors.initials: S
authors.lastname: Suzuki
authors.forename: Koichi
authors.initials: K
authors.lastname: Sagara
authors.forename: Takayuki
authors.initials: T
authors.lastname: Otsuka
authors.forename: Shunsuke
authors.initials: S
authors.lastname: Matsuno
authors.forename: Ryuichi
authors.initials: R
authors.lastname: Funada
authors.forename: Tokuhisa
authors.initials: T
authors.lastname: Uejima
authors.forename: Yuji
authors.initials: Y
authors.lastname: Oikawa
authors.forename: Junji
authors.initials: J
authors.lastname: Yajima
authors.forename: Akira
authors.initials: A
authors.lastname: Koike
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Nagashima
authors.forename: Hajime
authors.initials: H
authors.lastname: Kirigaya
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Sawada
authors.forename: Tadanori
authors.initials: T
authors.lastname: Aizawa
authors.forename: Takeshi
authors.initials: T
authors.lastname: Yamashita
mesh_terms: D000368:Aged; D000704:Analysis of Variance; D058070:Asymptomatic Diseases; D001281:Atrial Fibrillation / Q000145:classification / Q000150:complications / Q000175:diagnosis* / Q000628:therapy; D016009:Chi-Square Distribution; D004562:Electrocardiography; D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D011379:Prognosis; D012042:Registries; D012720:Severity of Illness Index