The statistical data analysis was carried out using the Python programming language and libraries such as NumPy, SciPy, Pandas, and Matplotlib.<h4>Results</h4>The study demonstrated a significant increase in the number of CD68+ macrophages in the myocardium of PASC patients compared to patients who did not have a history of COVID-19 (<i>p</i> = 0.014 and <i>p</i> = 0.007 for patients with and without myocarditis, respectively), predominantly due to M2 macrophages. Here, CD68 is linked to long COVID-19.