Old panic attacks in midday sleep are mostly symptoms due to the redistribution of blood after the midday diet, resulting in a relative lack of blood supply to the cardiovascular vessels. The corresponding deficiency in cardiovascular blood supply can induce angina pectoris, which can lead to arrhythmias and various types of arrhythmias, such as slow arrhythmias, sinus bradycardia, tachyarrhythmias, tachycardia, etc. It is recommended that 24-hour ambulatory ECG monitoring be performed to clarify the occurrence of arrhythmias such as paroxysmal supraventricular tachycardia and to give appropriate treatment.