The normal heart rhythm originates from the sinus node, which sends impulses to the atria to cause atrial contractions, and then to the ventricles to cause ventricular contractions, thus completing a complete heartbeat. In adults, the heart rate ranges from 60 to 100 beats per minute. Arrhythmias are abnormalities in the origin and/or conduction of heart impulses, resulting in abnormal heartbeat frequency and/or rhythm, such as rapid heartbeat, bradycardia, or abnormal heart rhythm such as atrial premature beats, ventricular premature beats, atrial tachycardia, atrial flutter, atrial fibrillation, ventricular tachycardia, etc. Arrhythmias are an important group of cardiovascular diseases that can develop alone or be complicated by other cardiovascular diseases such as coronary artery disease and cardiomyopathy. Some arrhythmias can be “benign” diseases that can be treated appropriately and are harmless, while others can seriously endanger your health, such as atrial fibrillation, which may cause “panic, fatigue, chest tightness, shortness of breath” and other discomforts, as well as induce Heart failure and the risk of stroke (according to current epidemiological data, the risk of stroke is 5-7 times higher in people with atrial fibrillation than in those with normal heart rhythm, and more than 20% of strokes are caused by atrial fibrillation); while bradycardia, or atrioventricular block, especially complete atrioventricular block, can lead to reduced blood ejection from the heart and insufficient blood supply to the brain because the heartbeat is too slow, in addition to dizziness, black haze or even In addition to dizziness, blackness and even transient loss of consciousness, the condition may be life-threatening in severe cases. Therefore, timely diagnosis of various arrhythmias, those who should receive treatment, as soon as possible to carry out targeted treatment, while some cases of “benign passage”, you can put down the burden of thought, better life, study and work.