My friend heart beats rapidly at very random times and he doesn't think thats a problem. What can he do about his random rapid heart beat?

See a doctor. There are many causes of this .It would be helpful to know how fast his heart rate gets.He might well need blood tests such as thyroid testing.He would also need an electrocardiogram and possibly a 24 hr heart monitor called a holter monitor.It would be important to see his doctor to determine if the rapid heart rate originates from the top or bottom of the heart.Avoid caffeine and see a doctor!
Rapid heart rate. It could be physiological or pathological. Your friend needs to see a cardiologist to figure out what kind of rapid rhythm it is by an ekg or holter or an event monitor.

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I wake up with a rapid heart beat sometimes and throw up about 3 times a month after u wake up that way. My feet hurt all the time at work whatisthis?

Event monitor. Ask your doctor to prescribe an event recorder which is a monitor that records your heart rhythm and beats at the time these events occur, he may advise you 30 days monitor and based on his / her finding , your doctor will guide you on the right Therapy. Read more...
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Why am I having rapid heart beat and breathing problems all of a sudden on stairs. I did ok a year ago at 60?

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Rapid heart rate. If you are having rapid heart rate on climbing up stairs, (which did not happen before) you really need to get checked, it could be atrial fibrillation or CHF etc. Read more...