Could Headphones interfere with a Pacemaker or Defibrillator?

Published Monday, November 10, 2008 5:25 PM

Could Headphones interfere with a Pacemaker or Defibrillator?

    

     Do people with a pacemaker or a defibrillator have to worry about the magnets in earphones disrupting the device and preventing it from doing its job? According to the FDA earlier this year mp3 players and other devices poses no threat to these devices as long as they are used properly. A group of doctors wanted to find out if the headphones had the same result. I mean after all you can’t listen to an iPod without earphones.
    
    They test eight different models of earphones on 60 different people with heart devices. When the earphones were about an inch from the device there was some interference that resulted. About 25% of the 27 pacemakers show the interference and 10 of the 33 patients defibrillators showed signs if interference. One of the patient’s pacemakers actually reset it’s self.
    
    The interference can prevent the defibrillators from delivering that shock to the heart that cold save a person’s life. It the pacemakers the interference could cause heart palpitations. The effect that the headphones have on the devices falls off quickly as the magnet gets farther away.

  The only part of this story that I don’t understand and maybe its because I don’t understand pacemakers and defibrillators, but how do you get a headphone an inch from a pacemaker? Isn’t it physically inside the person? I guess it couldn’t be if they were able to get the headphones that close.

 



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Comments

# Alexgreene said on Tuesday, November 11, 2008 11:31 AM

That would not be cool to be jammin to your music and when you take your earphones off you have a heart attack because the magnets and the interference. Not cool.

# BioBlogger said on Tuesday, November 11, 2008 4:40 PM

This actually makes a lot of sense. Pacemakers are implanted into your chest cavity, probably only an inch or two from the surface. They are electrical devices, and so are prone to electric interference from magnets. So if you have a pacemaker, get very weak headphones and don't put them near your chest.

I'll try to explain how pacemakers and defibrilators work.

The heart has to beat constantly or you will die. It is a complex pump made up of 4 chambers lined with muscles. When one set of chambers squeezes, the other set relaxes, allowing blood to move. Your heartbeat is the sound of these rhythmic contractions.

If all chambers squeeze at once, or relax at once, no blood will move. This will cause a person to die in minutes. The rhythm of contractions is basically what keeps you alive. Your heart is controlled by a set of electrical impulses controlled by nerves specifically designed to keep this rhythm. If these nerves impulses fire too often or too little, it can cause a heart attack.

The pacemaker basically replaces these nerves with an electrical device that does the same thing, keeping the heartbeat steady. If too many impulses fire too often, the whole heart contracts and no motion is possible. A defibrilator sends a shock to stun the muscles and reset their rhythm. It's like tripping a circuit breaker in your heart.

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