Arrhythmia is caused by abnormal excitation of the sinoatrial node or excitation originating outside the sinoatrial node, with slow conduction, blockage, or conduction through abnormal pathways. This results in the frequency and (or) rhythm abnormalities of heartbeats, which are collectively referred to as arrhythmias. Most of the causes include the following: one is genetic arrhythmias, often due to gene channel mutations, such as the commonly seen long QT syndrome, short QT syndrome, Brugada syndrome, etc. There are also acquired arrhythmias, seen in various organic heart diseases, including coronary atherosclerotic heart disease, commonly referred to as coronary heart disease, cardiomyopathy, myocarditis, and rheumatic heart disease, particularly prevalent during heart failure or acute myocardial infarction. Arrhythmias are also not uncommon in basically healthy individuals or patients with autonomic dysfunction. Other causes include electrolyte imbalance or endocrine disorders, and sometimes anesthesia, hypothermia, or surgery, such as thoracic or cardiac surgery, or medications, central nervous system diseases may also cause arrhythmias, but the specific reasons are not very clear.