title: Morphological and functional measurements of the heart obtained by magnetic resonance imaging in Brazilians.
abstract: BACKGROUND
  Still today, measurements used as a reference in the cardiac magnetic resonance imaging have been obtained mainly from studies carried out in North-American and European populations.
  
  
  OBJECTIVE
  To obtain measurements of the diastolic diameter, systolic diameter, end diastolic volume, end systolic volume, ejection fraction, and myocardial mass of the left and right ventricles in Brazilians.
  
  
  METHODS
  54 men and 53 women, with mean age of 43.4 ± 13.1 years, asymptomatic, with no cardiomyopathies, have been subjected to the cardiac magnetic resonance imaging, using a balanced steady state free precession technique.
  
  
  RESULTS
  The averages and the standard deviations of the parameters for the left ventricle have been: diastolic diameter = 4.8 ± 0.5 cm; systolic diameter = 3.0 ± 0.6 cm; end diastolic volume = 128.4 ± 29.6 mL; end systolic volume = 45.2 ± 16.6 mL; ejection fraction = 65.5 ± 6.3%; mass = 95.2 ± 30.8 g. For the right ventricle, they have been: diastolic diameter = 3.9 ± 1.3 cm; systolic diameter = 2.5 ± 0.5 cm; end diastolic volume = 126.5 ± 30.7 mL; end systolic volume = 53.6 ± 18.4 mL; ejection fraction = 58.3 ± 8.0%, and mass = 26.1 ± 6.1 g. The masses and the volumes were significantly greater in the men, except for the end systolic volume of the left ventricle. The ejection fraction of the right ventricle has been significantly greater in the women. There has been a significant and inverted correlation of the systolic volume of the right volume with the progression of the age.
  
  
  CONCLUSIONS
  This study has described, for the first time, cardiac measurements obtained through the cardiac magnetic resonance imaging in Brazilians, asymptomatic, with no cardiomyopathies, showing differences in accordance with gender and age.
authors.affiliation: Universidade Federal do Rio Grande do Norte, Natal, RN, Brazil. robmacedo@yahoo.com
authors.forename: Robson
authors.initials: R
authors.lastname: Macedo
authors.forename: Juliano Lara
authors.initials: JL
authors.lastname: Fernandes
authors.forename: Solange Souza
authors.initials: SS
authors.lastname: Andrade
authors.forename: Carlos Eduardo
authors.initials: CE
authors.lastname: Rochitte
authors.forename: Kênio Costa
authors.initials: KC
authors.lastname: Lima
authors.forename: Alvaro Campos Cavalcanti
authors.initials: AC
authors.lastname: Maciel
authors.forename: Fernanda Cunha
authors.initials: FC
authors.lastname: Maciel
authors.forename: Geraldo Souza Pinho
authors.initials: GS
authors.lastname: Alves
authors.forename: Otávio Rizzi
authors.initials: OR
authors.lastname: Coelho
authors.forename: Rosiane Viana Zuza
authors.initials: RV
authors.lastname: Diniz
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001938:Brazil; D003971:Diastole / Q000502:physiology; D005260:Female; D006352:Heart Ventricles / Q000033:anatomy & histology*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D012016:Reference Values; D018709:Statistics, Nonparametric; D013318:Stroke Volume / Q000502:physiology*; D013599:Systole / Q000502:physiology; D016276:Ventricular Function / Q000502:physiology*