Right bundle branch conduction block is divided into complete right bundle branch conduction block and incomplete right bundle branch conduction block according to the degree of block. Complete right bundle branch block means that the right bundle branch that transmits to the right ventricle is faulty and the bioelectrical signal cannot be transmitted directly to the right ventricle, but it does not matter, the electrical signal can be transmitted from the left ventricle, only the right ventricle contraction is slightly delayed. Complete right bundle branch block does not necessarily have extensive myocardial damage, and is often not significant if it is not associated with other organic heart disease. If you have no organic heart disease on further medical examination, incomplete right bundle branch block is usually of no pathologic significance. Since there is no pathological significance, i.e., a normal healthy lifestyle will not affect it. Patients with first-degree AV block are often asymptomatic and have a diminished apical first heart sound on auscultation, which is due to a prolonged P-R interval and the proximity of the AV valve leaflets to closure at the onset of ventricular contraction. Patients with second degree type I AV block may have pause in heartbeat. Patients with second degree type II AV block often have fatigue, dizziness, fainting, convulsions and cardiac insufficiency, and often develop complete AV block within a short period of time. The symptoms of complete AV block depend on the establishment of ventricular autonomic rhythm and the basic condition of the ventricular rate and myocardium. In patients with bifascicular lesions, the ventricular autonomic rhythm point is very low, and a slow ventricular rate of 40 beats/min or less can lead to cardiac insufficiency and ischemic syndrome (Adams-Stokes,Syndrome) or sudden death, and a slow ventricular rate often leads to increased systolic blood pressure and increased pulse pressure.