The key lies in making the correct diagnosis according to the cause of arrhythmia, that is cardiac arrhythmia is caused by "internal problems" (heart disease) or "foreign aggression" (non-heart disease). For "internal problems", we must actively "peace within" to treat heart attack; and for "foreign aggression"(non-heart disease) it must be treated correctly, such as infection control, to correct electrolyte imbalance, additional potassium, disable certain drugs, etc. arrhythmia would disappeared. A few older people with atrial fibrillation caused by hyperthyroidism is often misdiagnosed as coronary heart disease caused. If not control hyperthyroidism, it is difficult to control atrial fibrillation. This treatment of arrhythmias should also be paid to the choice of appropriate anti-arrhythmia medicines.