Pacemakers have a complicated set of components that allow,
among other things, the patient’s level of activity to be calculated, his/her
heart rate to be measured and, on the basis of this information, electrical
impulses to be generated in order to make the heart beat. These sets of
components built into a larger object and capable of assessing a situation and
taking decisions based on this assessment are known as intelligent systems, an
integration of technologies offering various advantages like reduction in
device size, lower energy consumption, lower cost and other functions.