Many people get nervous when they have a medical checkup for left bundle branch block, mainly because they do not know about the disease. In general, a complete left bundle branch block is a more serious arrhythmia. It is a disease of the cardiac conduction system, and the most effective way to treat it is to go to a large tertiary care hospital for cardiac electrophysiological measurements. Complete left bundle branch block is a type of intraventricular block (i.e., bundle branch block). Complete left bundle branch block is most often seen in coronary artery disease, myocardial infarction, hypertension, cardiomyopathy, etc. It is rarely seen in healthy people. Treatment of complete intra-atrial conduction block is mainly to treat the primary disease and symptomatic treatment. An artificial pacemaker should be placed if necessary. If there are no other factors causing complete left bundle branch block, such as hypertension, myocarditis and other causes, it is considered to be an idiopathic arrhythmia, and there is no specific drug for treatment, which is symptomatic treatment during the attack. Usually there are no serious effects. Pay attention to blood pressure testing and protection of cardiac function. Complete intra-atrial conduction block, or atrial separation, is often seen in the critical phase of organic heart disease and often occurs in the hours before death in critically ill patients. It can also be seen with digitalis toxicity, uremia, and medications such as amiodarone. Most often, they present as clinical manifestations of the primary disease. Incomplete intra-atrial conduction block, although not hemodynamically significant, is often associated with a history of recurrent paroxysmal atrial fibrillation or atrial flutter in half of patients, and 40% of patients may have a history of atrial prophase contractions and atrial tachycardia. Patients may have symptoms such as chest tightness, shortness of breath, and irregular heartbeat. Treatment of complete intra-atrial conduction block focuses on treatment of the primary cause and symptomatic management. Artificial pacemakers should be placed if necessary. Actively pay attention to the hospital cardiology department as soon as possible, combined with previous ECG performance, and clinical symptoms of the situation, if no uncomfortable symptoms, long-term presence, do not stress, is physiological. If you have coronary heart disease, you should pay attention to a lighter diet, avoid stress and strain, quit smoking and limit alcohol, and use some medication as recommended by a doctor familiar with the condition. If there is hypertension or high blood pressure, etc. also need to be treated.