Although recent studies have suggested that blacks compared with whites have an increased prevalence of left ventricular hypertrophy, it remains uncertain whether this is true despite adjustment for body composition (fat mass and fat free mass) and when assessed by cardiac MRI in the general population.
The Dallas heart study is a population based study of Dallas county in which 1335 black and 858 white participants of 30 -67 years of age underwent detailed assessment including dual-energy x-ray absorptiometry scan to measure body composition and cardiac MRI.
The study results revealed that the enlargement of the left side of the heart is two to three times more common among blacks than whites as assessed by cardiac MRI. The study results further emphasizes the need of aggressive blood pressure control in the African-American community. This ethnic difference in left ventricular mass is independent of differences in body composition.