Khatana SAM, et al. - In middle-aged adults (aged 45 to 64 years), researchers explored the connection between Medicaid expansion and cardiovascular mortality rates. From November 2018 to January 2019, data were analyzed. According to this difference-in-differences analysis, counties in states that Medicaid expanded had significantly lower rates of cardiovascular mortality among middle-aged adults after expansion compared to counties in states that did not expand Medicaid. These results indicate that the recent expansion of Medicaid has been associated with reduced cardiac mortality in middle-aged adults and can be considered as further expansion of Medicaid is being discussed.