3 doctors weighed in:

What are the problems/risks of a fast heart rate for your heart?

3 doctors weighed in
Dr. Dan Fisher
Internal Medicine
2 doctors agree

In brief: Varies.

High resting heart rates 100+bpm may be a sign of illness and are associated with cardiomyopathy when sustained for very long periods.
High exercise induced heart rates 130+bpm may be conditioning and beneficial. Extremely high rates such as seen with some tachycardias 220+ may be suddenly fatal as forward flow fails due to inadequate pump fill.

In brief: Varies.

High resting heart rates 100+bpm may be a sign of illness and are associated with cardiomyopathy when sustained for very long periods.
High exercise induced heart rates 130+bpm may be conditioning and beneficial. Extremely high rates such as seen with some tachycardias 220+ may be suddenly fatal as forward flow fails due to inadequate pump fill.
Dr. Dan Fisher
Dr. Dan Fisher
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Dr. Bennett Werner
Internal Medicine - Cardiology

In brief: Depends on rate

In adults: heart rates of 90-110 are harmless and may be appropriate depending on circumstances.
Persistent hr of >120 can cause weakened heart muscle leading to heart failure ("tachycardia mediated cardiomyopathy"). Hr >150 often causes dizziness and breathlessness. Hr >200 often causes dizziness or passing out . Hr> 250 causes shock and leads to death. None of this applies to infants/children.

In brief: Depends on rate

In adults: heart rates of 90-110 are harmless and may be appropriate depending on circumstances.
Persistent hr of >120 can cause weakened heart muscle leading to heart failure ("tachycardia mediated cardiomyopathy"). Hr >150 often causes dizziness and breathlessness. Hr >200 often causes dizziness or passing out . Hr> 250 causes shock and leads to death. None of this applies to infants/children.
Dr. Bennett Werner
Dr. Bennett Werner
Thank
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