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
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.
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.
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.
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.