Complete right bundle branch block is a common arrhythmic disease, which may be caused by organic cardiac lesions, overloading of the right heart, etc. Patients with this disease may have symptoms such as chest tightness, palpitations, etc., and it may also be seen in patients with no obvious organic diseases. 1. Organic cardiac lesions: diseases such as coronary artery disease and acute infarction may cause right bundle branch dysfunction, which in turn induces complete right bundle branch block. 2. Right heart overload: right ventricular hypertrophy such as pulmonary embolism and pulmonary heart disease may also cause complete right bundle branch block. 3. It may be seen in some patients without organic disease and has a better prognosis. If the symptoms of complete right bundle branch block are not too obvious, generally do not need to be treated, regular review can be; if the patient’s condition is more serious, there are also serious symptoms of palpitations or chest tightness, should be timely to the hospital for treatment.