Atrioventricular block is a condition in which the transmission of electrical impulses in the heart from the atria to the ventricles is partially or completely interrupted. Atrioventricular block is classified into 3 different grades, of which second-degree AV block is moderate but can still cause many dangerous complications.

Atrioventricular block is a partial or complete obstruction of the conduction of electrical impulses from the atria to the ventricles due to anatomical or functional impairment. If the disease is not detected and treated early, it will progress to higher stages, causing arrhythmias and various dangerous complications.