For patients with cardiac arrhythmias, oxygen inhalation has a useful effect. Patients with arrhythmias, unstable coronary angina, and even acute coronary syndrome can be treated with oxygen, because patients with significant arrhythmias will have insufficient blood and oxygen supply to the myocardial cells, thus leading to symptoms of hypoxia, and patients will have varying degrees of chest tightness, shortness of breath, palpitations, and dyspnea, and severe arrhythmias can trigger heart failure or have a significant reduction in ejection fraction In this case, oxygen therapy is used. Oxygen therapy is the correct and useful treatment in such cases. Oxygen can be administered via bottled nasal oxygen or by applying oxygen bags or cylinders, which can be useful for patients with arrhythmias as they can improve oxygenation and increase arterial oxygen saturation by continuous low-flow oxygen administration.