Atrioventricular block

Atrioventricular block refers to the impulsivity of the sinoatrial node: during the process from the atrium to the ventricle, due to physiological or pathological reasons, the atrioventricular junction area is partially or completely blocked temporarily or permanently. According to the degree of block, it can be divided into 3 degrees: the first degree is the extension of the atrioventricular conduction time, but all atrial impulses can be transmitted to the ventricle; the second degree is that some impulses cannot be transmitted to the ventricle; the third degree is that all impulses are uniform. It cannot be transmitted to the ventricle, so it is also called complete atrioventricular block.