Our study results on the occurrence of arrhythmia and risk factors for arrhythmia in COVID-19 patients with myocardial infarction indicated statistically significant differences between arrhythmia and non-arrhythmia patients in terms of heart rate, PT, APTT, blood glucose, uric acid, serum potassium, serum total cholesterol, hs-TnI, NT-proBNP, aortic root diameter, LAD, LVEDD, LVEF, FS, ESV, and diabetes. The gene discussed is NPPB; the disease is cardiac arrhythmia.