Pace Maker
The fairly modern invention, the pace maker produces a heart beat is by electrical impulses sent along a pathway in an area between the two sides of the heart and this impulse is then sent to both sides of the heart muscle to cause a contraction.
The pace maker makes a time span between each contraction and this sets the 'pace' at which the heart can comfortably work. If this electrical pathway is not functioning properly as with some heart disease, then an artificial pacemaker can be inserted into the chest and attached to the heart, with a tiny battery producing the electrical impulses under controlled conditions.
Regular check-ups are needed to assess that the pacemaker is working well and that the battery is not running out.
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