In right ventricular conduction delay, or right ventricular block, in right bundle branch conduction block, the heart is transmitted from the left bundle branch to the left ventricle, and then through the myocardium of the left ventricle to the myocardium of the right ventricle. Therefore, the contraction of the myocardium is the left ventricle first and then the right ventricle, which will result in the contraction of the left and right ventricles not being perfectly synchronized. Each beat of the heart is triggered by an electrical impulse from the sinus node, which travels down the conduction system of the heart and then bifurcates into left and right bundle branches, which lead to the left and right ventricles, respectively. The left bundle branch induces contraction of the left ventricle and the right bundle branch induces contraction of the right ventricle.