ACE2 and cardiac arrhythmia: Although current studies have shown that COVID-19 may cause arrhythmias due to changes in angiotensin converting enzyme 2 expression, myocarditis, cytokine storms, hypoxemia, myocardial strain, electrolyte abnormalities, intravascular volume imbalance, drug interaction and stress response caused by viral infection, it is impossible to follow up with patients with arrhythmia due to the length of the pandemic being less than three years.