title: [Regional left ventricular dysfunction and its association with complex ventricular arrhythmia, in chagasic patients with normal or borderline electrocardiogram].
abstract: BACKGROUND
  Sudden death is the major cause of death among chagasic patients. A significant number of fatal events in patients without apparent heart disease and borderline electrocardiogram, but with contractile ventricular dysfunction, have been documented. This work aimed to determine the association between regional dysfunction and the presence of ventricular arrhythmia in chagasic patients without apparent heart disease.
  
  
  METHODS
  Forty-nine patients with normal or borderline electrocardiogram were submitted to echocardiogram, exercise stress test and Holter. The presence of cardiac contractile alterations and complex ventricular arrhythmia was analyzed. Statistic analysis used the general Log-Linear model.
  
  
  RESULTS
  Mean age 56 years-old; 55% women. Regional ventricular dysfunction was verified in 24.5% of patients; positive Holter in 12% and exercise stress test in 18%. An association between complex ventricular arrhythmia and contractile abnormalities in the presence of mild left ventricle dysfunction was verified.
  
  
  CONCLUSIONS
  Regional contractile abnormalities with mild left ventricle dysfunction in Chagasic patients indicate a group with higher risk of complex ventricular arrhythmias, who require specific follow-up.
authors.affiliation: Serviço de Cardiologia, Hospital Universitário Clementino Fraga Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ. fvernin@gmail.com
authors.forename: Flavia Vernin de Oliveira
authors.initials: FV
authors.lastname: Terzi
authors.forename: Aristarco Gonçalves de
authors.initials: AG
authors.lastname: Siqueira Filho
authors.forename: Emília Matos do
authors.initials: EM
authors.lastname: Nascimento
authors.forename: Basílio de Bragança
authors.initials: Bde B
authors.lastname: Pereira
authors.forename: Roberto Coury
authors.initials: RC
authors.lastname: Pedrosa
mesh_terms: D000328:Adult; D000368:Aged; D001145:Arrhythmias, Cardiac / Q000175:diagnosis / Q000209:etiology* / Q000503:physiopathology; D014355:Chagas Disease / Q000150:complications* / Q000503:physiopathology; D015150:Echocardiography, Doppler; D015716:Electrocardiography, Ambulatory; D005080:Exercise Test; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D018487:Ventricular Dysfunction, Left / Q000150:complications* / Q000175:diagnosis / Q000503:physiopathology; D055815:Young Adult