Arrhythmias are abnormalities in the frequency, rhythm, site of origin, conduction velocity and sequence of excitation of heart impulses, and can be classified into tachyarrhythmias (such as premature beats and tachycardia) and slow arrhythmias (such as sinus bradycardia and conduction block). There are four types of drugs used in Western medicine to treat tachyarrhythmias: Na+ channel blockers, β-blockers, action potential prolongers and calcium antagonists; the defects of their pharmacological treatment are: they are easily resistant to drugs, can cause arrhythmias and inhibit myocardial contraction. Western medicine has two types of drugs for the treatment of slow arrhythmias: anticholinergic drugs and β-adrenergic receptor stimulants; the defects of their drug therapy are: short duration of drug action, large adverse effects, not suitable for long-term use, and easy recurrence after discontinuation of drugs. Cardiac arrhythmia belongs to the categories of palpitation, palpitation, chest paralysis and vertigo in traditional medicine. According to Chinese medicine, normal heart rate and rhythm must be maintained by the relative balance of heart yin and heart yang, which is the physiological state of “yin and yang secret”. If the deficiency or hyperactivity of either heart yin or heart yang causes the heart’s yin and yang to be uncoordinated, i.e., the relative balance cannot be maintained, the disease will develop, which is the pathological state of “yin and yang imbalance”. Generally speaking, when the organism is deficient in yin and hyperactive in yang, the heartbeat will be accelerated, while when it is deficient in yang and hyperactive in yin, the heartbeat will be slowed down; therefore, most of the rapid arrhythmias are based on yin deficiency, while most of the slow arrhythmias are based on yang deficiency. By suppressing and supporting yin and yang, TCM restores the relative balance between heart yin and heart yang, thus restoring the heart rhythm to normal. The advantages of TCM treatment for arrhythmias are: adjusting the patient’s function as a whole, eliminating arrhythmias and various symptoms; easy to consolidate the effect after the effect is seen; less toxic side effects.