Answer:
A "Pacemaker" can be external or internal and usually generates electrical stimuli to the heart muscle with an electrode.
Explanation:
Pacemakers allow you to perceive when the heart is beating irregularly or very slowly. This small device sends an electrical signal or electrical impulses to the heart, which makes it beat at the normal rate, because the electrical impulses are transmitted to the heart muscle; by means of an electrode that connects the device with the heart muscle functionally thus an adequate functionality of the heart.
The pacemaker is able to detect heartbeat failures and, at that time, sends an electrical signal through the wires (electrodes) so that the heart contracts.
Pacemakers may have more than one electrode depending on the number of areas of the heart that we need to stimulate.
