Frankenfeld CL, et al. - Researchers assessed the impact of residential racial composition, diversity, and segregation on cardiovascular disease (CVD) mortality by analyzing the Mortality Disparities in American Communities (MDAC) data, which is a record linkage of the nationally representative American Community Survey (ACS) data with the National Death Index (NDI). They found that, segregation and diversity were related to major CVD mortality, and black individuals may be influenced differently in some respects than the total population. Major CVD mortality was positively related to interaction and isolation, inversely related to black percentage and diversity, and not related to dissimilarity, in all races combined. Black individuals showed positive association of major CVD mortality with isolation and black percentage, but not with dissimilarity, interaction, or diversity.