Heart Heart's Pacemaker
After the electrical impulse goes through the AV Node, the electrical impulse will go through the 'conduction system' of the ventricle. Conduction means heat or electricity traveling through something. This brings the electrical impulse to the ventricles. Bundle means strings or wires grouped together in parallel. The left bundle branch travels to the left ventricle and the right bundle branch travels to the right ventricle. At the end of the bundle branches, the electrical impulse goes into the ventricular muscle through the Purkinje Fibers. This is what makes ventricle contraction take place and makes ventricular systole.