title: Right ventricular Doppler echocardiographic study of indeterminate form of chagas disease.
abstract: BACKGROUND
  Patients with indeterminate form of Chagas disease/cardiac normality (ICD/CN) exhibited normal electrocardiograms and chest X-rays; however, more sophisticated tests detected some degree of morphological and functional changes in the heart.
  
  
  OBJECTIVE
  To assess the prevalence of systolic and diastolic dysfunction of the right ventricle (RV) in patients with ICD/CN.
  
  
  METHODS
  This was a case-control and prevalence study. Using Doppler two-dimensional echocardiography (2D), 92 patients were assessed and divided into two groups: group I (normal, n = 31) and group II (ICD/CN, n = 61).
  
  
  RESULTS
  The prevalence of RV systolic dysfunction in patients in groups I and II was as follows: fractional area change (0.0% versus 0.6%), mobility of the tricuspid annulus (0.0% versus 0.0%), and S-wave tissue Doppler (6.4% versus 26.0%, p = 0.016). The prevalence of global disorders such as the right myocardial performance index using tissue Doppler (16.1% versus 27.8%, p = 0.099) and pulsed Doppler (61.3% versus 68%, p = 0.141) and diastolic disorders such as abnormal relaxation (0.0% versus 6.0%), pseudonormal pattern (0.0% versus 0.0%), and restrictive pattern (0.0% versus 0.0%) was not statistically different between groups.
  
  
  CONCLUSIONS
  The prevalence of RV systolic dysfunction was estimated to be 26% (S wave velocity compared with other variables), suggesting incipient changes in RV systolic function in the ICD/CN group.
authors.affiliation: Hospital das Clínicas, Faculdade de Medicina, Universidade Federal de Goiás, Goiânia, GO, Brazil.
authors.forename: Rogério Gomes
authors.initials: RG
authors.lastname: Furtado
authors.affiliation: Hospital das Clínicas, Faculdade de Medicina, Universidade Federal de Goiás, Goiânia, GO, Brazil.
authors.forename: Daniela do Carmo Rassi
authors.initials: Ddo C
authors.lastname: Frota
authors.affiliation: Hospital das Clínicas, Faculdade de Medicina, Universidade Federal de Goiás, Goiânia, GO, Brazil.
authors.forename: João Batista Masson
authors.initials: JB
authors.lastname: Silva
authors.affiliation: Hospital das Clínicas, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, São Paulo, SP, Brazil.
authors.forename: Minna Moreira Dias
authors.initials: MM
authors.lastname: Romano
authors.affiliation: Hospital das Clínicas, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, São Paulo, SP, Brazil.
authors.forename: Oswaldo César de
authors.initials: OC
authors.lastname: Almeida Filho
authors.affiliation: Hospital das Clínicas, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, São Paulo, SP, Brazil.
authors.forename: André
authors.initials: A
authors.lastname: Schmidt
authors.affiliation: Hospital das Clínicas, Faculdade de Medicina, Universidade Federal de Goiás, Goiânia, GO, Brazil.
authors.forename: Salvador
authors.initials: S
authors.lastname: Rassi
mesh_terms: D000328:Adult; D001794:Blood Pressure / Q000502:physiology; D001938:Brazil / Q000453:epidemiology; D016022:Case-Control Studies; D014355:Chagas Disease / Q000000981:diagnostic imaging / Q000453:epidemiology* / Q000503:physiopathology; D003971:Diastole / Q000502:physiology; D015150:Echocardiography, Doppler / Q000379:methods; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D012016:Reference Values; D018709:Statistics, Nonparametric; D013318:Stroke Volume / Q000502:physiology; D013599:Systole / Q000502:physiology; D013997:Time Factors; D018497:Ventricular Dysfunction, Right / Q000000981:diagnostic imaging / Q000453:epidemiology* / Q000503:physiopathology