Cardiomyocytes are the single nucleus cylindrical and elliptical cells of the heart measuring 80–120 µm in length and 20–30 µm in diameter. Cardiomyocytes have a limited capacity to regenerate. The lost cardiomyocytes are replaced by fibroblasts and myofibroblasts which form scar tissues. The formation of these non?contracting fibrous scars alters the workload of the...