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More Cardiac Myths and Facts

We received a very positive response to our first article on cardiac myths and facts. Here's a new set of questions about implantable cardioverter defibrillators (ICDs) and pacemakers. See if you can tell myth from fact.

Myth or Fact? It is unsafe to go in a swimming pool if I have a defibrillator.

Myth. It is safe to go in a swimming pool with a defibrillator. However, you should never swim alone. It is important to have someone there in case you receive therapy from your device and need assistance.

Myth or Fact? I must wear a MedicAlert® bracelet if I have an implanted device.

Myth. It is your choice whether to wear a MedicAlert® bracelet. However, if you are often by yourself, it can be a good idea. The bracelet allows doctors to easily identify that you have a pacemaker or defibrillator. What you should always carry with you is your Medical Device Identification Card. You will receive this card shortly after your operation. The card lets healthcare professionals know that you have a device and tells doctors the exact model of your pacemaker or defibrillator. Also be sure to let all your healthcare providers know that you have an implanted device.

Myth or Fact? I should not undergo an MRI (magnetic resonance imaging) because of my device.

Fact. At present, MRI exams should be avoided if you have a pacemaker or defibrillator. The strong magnetic fields emitted during an MRI may prevent your device from working properly.

Myth or Fact? I can still operate a lawn mower even though I have an implanted device.

Fact. Lawn mowers and other gas-powered tools such as chainsaws and snow blowers can be used. Remember to keep these tools 12 inches (30 cm) from your device during use. Coming into close contact with the running motor in these tools will not damage your device, but may temporarily affect how it works. These effects would end once the running motor is moved farther from the implanted device. If you have a defibrillator, you may also receive a shock if you come into close contact with these tools while the motor is running.

Myth or Fact? A pacemaker will keep my heart rate from being irregular.

Myth. A pacemaker does not prevent an irregular heartbeat. Instead, it detects when the heartbeat is too slow or has not adjusted to your activity level. It then sends electrical signals to increase the heart rate to an appropriate level.

Myth or Fact? I must limit my daily activities and not exert myself because I have a pacemaker or defibrillator.

Myth. Unless your doctor tells you otherwise, you will be able to return to most activities. As soon as you feel up to it, you should be able to work, exercise, and have sex.

Myth or Fact? If I have an implanted device, I should refrain from exercise like running and biking.

Myth. If your general health permits, having an implanted device should not prevent you from running or biking. In fact, maintaining a moderate exercise program will help keep you healthy. Talk to your doctor about creating an exercise plan that's right for you.

Note: Individual symptoms, situations, and circumstances may vary. Please consult your physician or qualified health provider regarding your condition and appropriate medical treatment. The information provided is not intended to be used for medical diagnosis or treatment or as a substitute for professional medical advice.

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