The contraption above is called a Pacemaker and can according to Wipkipedia be defined like this:
A pacemaker (or artificial pacemaker, so as not to be confused with the heart's natural pacemaker) is a medical device which uses electrical impulses, delivered by electrodes contacting the heart muscles, to regulate the beating of the heart. The primary purpose of a pacemaker is to maintain an adequate heart rate, either because the heart's native pacemaker is not fast enough, or there is a block in the heart's electrical conduction system.There are very many types of these. According to the manufacturer (Medtronic),
The Medtronic InSync® III device, implanted in the upper chest, is designed to resynchronize the failing heart’s lower chambers in an effort to improve its pumping action.The casing is made in titanium and had three wires that connected to three of the four chambers of the heart in various ways. It was also contained a battery that was supposed to last for seven years. You may well ask how all that got room in the chest cavity. The copy of the x-ray to the left shows you how it looks (The picture is courtesy of Haukeland University Hospital).
Now you may ask: Why do I know so much about it? The answer is simple: It is mine. I wore it for more than three years. When I had just turned fifty I got a serious, degenerative disease of the heart muscle that fairly rapidly turned into a chronic heart failure. I got this in an attempt to help the heart's own timing system so that I could utilise the maximum of the power that was left in the heart muscle. It did for a while.
And why don't I have it inside any more?. I don't need it. I got a "new" heart.
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