Cardiac pacemaker

self-excitation property. The electrical potentials for contraction are caused by a group of specialized cells in the heart which control the heartbeat. These cells produce electrical impulses which spread across the heart causing it to contract. The main pacemaker of heart, the senatorial node, initiates the heart beat by generating an electrical impulse which travels to the left and right atria, causing them to contract. Following the start of atrial depolarization, the impulse quickly arrives…

In the United States and in most industrialized countries, most adults die from heart disease (Health in the Later Years, 2013). According to the American Heart Association (2013) an estimated 83.6 million American adults have 1 or more types of CVD, and of those 42.2 million are estimated to be age sixty and up. Heart disease affects people of all ages, however it is most prominent in adults age sixty-five and up. Cardiovascular disease and heart disease are terms that cover an array of…