Get Virtual Care
For Businesses
About Us
A member asked:
Can you faint from a fast heart beat?
3 doctors weighed in across 3 answers
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
Answered 6/20/2014
4k views
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).
Answered 6/20/2014
4k views
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.
Answered 6/20/2014
4k views
Related Questions
A member asked:
What is cause of warm, sometimes lactic acid burn in heart and inner chest associated with faintness and impending doom, feeling of dying?
A doctor has provided 1 answer
A member asked:
Hi, my pulse is very weak. I've been suffering lately from orthostatic tachycardia and faintness and had heart tests done but the very weak pulse is new with more frequent chest and jaw discomfort.
4 doctors weighed in across 3 answers
A member asked:
How does anxiety cause brain fog, lightheaded feeling/faint feeling? Always assumed it was more of heart attack feeling. Dont have fast heart/breaths.
A doctor has provided 1 answer
A member asked:
My heart skipped almost twitching fast beats .i felt dizzy and faint and couldn't breath.lasted a min. What is that called?
A doctor has provided 1 answer
People also searched for:
My heart beats fast --why?
What could cause an intermittent feeling of faintness, followed by a fast heart rate?
Is pain in the carotid artery a sign of heart failure with frequent PVC's, faintness, fast heart rate and bloating?
Is bisacodyl safe for heart patients ? I read it can cause faintness. Long QT syndrome and brugada syndrome safe?
Symptoms: break out into a cold sweat, hands start shaking, feeling of faintness, heart races. Out of theblue onset of symptons?
Didn't find what you're looking for?
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your questionMore of what we treat
Download HealthTap
Video visit and message your doctor
