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A 21-year-old female asked:

can you faint from a fast heart beat?

3 doctor answers3 doctors weighed in
Dr. Howard Feinberg
Rheumatology 37 years experience
Yes: If your heartbeat is too rapid it can limit the amount of blood your heart can pump and cause fainting. This can be very dangerous, even life threatening. You should see a doctor right away
Dr. Robert Fietsam
Thoracic Surgery 35 years experience
Yes, but uncommon: a fast heart rate, like over 180 beats a min, can result in smaller pulses of blood being ejected from the heart. This can lead to a lower blood pressure, then less blood to the brain, then passing out or fainting. Called ventricular tachycardia, on the TV shows, they say "V tach". Commonly treated with paddles to shock the heart (defib).
Dr. Paul Grin
Pain Management 36 years experience
Definitely, yes: Fainting occurs when the blood flow to the brain is reduced for a few seconds. There are many different kinds of tachycardia (fast heart beat), the ones that most commonly cause faint are ventricular tachycardia.

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Similar questions

A 33-year-old member asked:

Is it normal to have a highly fast heart beat after getting out of the heat?

2 doctor answers2 doctors weighed in
Dr. Bennett Werner
Cardiology 44 years experience
May be: Depends on what the rate is and how long it takes to settle down.
United Kingdom (Great Britain)
A 33-year-old male asked:

What can cause fast heart beat?

1 doctor answer1 doctor weighed in
Dr. Rick Koch
Cardiology 22 years experience
Many things: Benign things like dehydration or more serious causes....Please discuss with your physician.
Australia
A 42-year-old female asked:

When i'm in bed n i get up quickly n seatdown i get a fast heart beat n it slows down n then it beats fast again n it misses heart beats. Normal?

2 doctor answers2 doctors weighed in
Dr. Joseph Shen
Cardiac Electrophysiology 31 years experience
Could be, : If it happens infrequently. You have have been a bit dehydrated... If it occurs more than once a week and repeats itself, let you doctor know... Best luck!
A 23-year-old female asked:

I mostly have fast heart beat that keeps me little restless. Is it normal?

1 doctor answer1 doctor weighed in
Dr. Heidi Fowler
Psychiatry 25 years experience
Eval: This would need to be evaluated to tell you what the fast heart beat is related to. I recommend that you take to your physician about this so that it can be properly assessed.
A 37-year-old member asked:

What causes a fast heart beat right after i eat?

1 doctor answer1 doctor weighed in
Dr. Calvin Weisberger
Cardiology 51 years experience
Heart rate: Blood flow shifts some to the intestines for digestion in some circumstances an increase in heart rate can result.

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Last updated Jun 20, 2014
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