 Macrophages are important players in the inflammatory response after a heart attack. They can help repair the damage caused by the heart attack, but they also interact with other cells in the heart to promote healing. This cross-talk between macrophages and other cells in the heart is still not fully understood, but it could be a promising target for future treatments. This article was authored by Yu Hongjian, Xiao Jiu, Wen Juxiang, and others.