When cardiac cells are damaged by a heart attack they replaced by?

Cardiac muscle cells, also called cardiomyocytes, are the primary functional cells of the heart. These cells are responsible for the rhythmic contraction and relaxation of the heart that pumps blood throughout the body. When cardiac cells are damaged or lost, they cannot regenerate and are replaced by scar tissue. This scar tissue is composed of fibroblasts and other non-contractile cells that do not contribute to the pumping function of the heart. The formation of scar tissue can impair the heart's ability to contract effectively, leading to heart failure if the damage is extensive. Research efforts are ongoing to explore potential therapies that could promote the regeneration of cardiac cells and limit the formation of scar tissue after heart injury.