How does a pacemaker work?!
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As far as I know it senses the heart beat and if it stops or slows it sends a small electrical current out to the muscle to keep it beating
Other Answers:
Our hearts have a group of specialized cells that automatically generate impulses or little electric charges and these are distributed through out the heart. These impulses make the heart beat or pump blood.
Sometimes these are defective.
Some people have a device implanted under their skin that either substitute for the defective natural pacemaker by giving electric impulses at a rhythm similar to the natural heart.
Some people have a type that only works when the heart doesn't work right, so it may not give an impulse all the time. For instance it may only give an impulse only once in 10 beats.
Another type only reacts when the heart goes into a life threatening rhythm. It works like a miniature version of the deliberators EMT’s use.
Some are a combination of these.
The batteries in the pacemakers can last over 15 years long.
What is interesting is doctors can take a heart and transplant it and even though it is not 'wired' in, it will still carry the impulse and start beating once jump started with a littlt electricity.
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