Artificial Cardiac Pacemakers
What is a pacemaker? The sinus node, which acts as the heart’s pacemaker, is where the normal cardiac activity starts. After crossing the atria to reach the atrioventricular (AV) node, electrical wavefronts quickly spread to and depolarized the ventricles by entering the His-Purkinje system. When intrinsic cardiac automaticity or conduction integrity fails, the electrical excitability […]