A racing heart may be caused by normal or abnormal tachycardia.
Experiencing a racing heart or a fast heartbeat, not knowing why it’s happening, and not knowing what to do about it can be scary. Understanding when your heart is beating too fast, and what the causes of normal and abnormal tachycardia may be, can help you decide if you should see a doctor.
What is a racing or fast heartbeat?1
A racing or fast heartbeat means that your heart is beating faster than the normal heart rate of 60–100 times per minute.1 With normal tachycardia, the heart beats more than 100 times per minute.1 With an abnormal tachycardia, the heart can even go as fast as 400 beats per minute, even without influences like exercise or stress. When this happens, the heart can’t pump blood properly to your body and brain.
Normal and abnormal tachycardia can have similar symptoms but different causes and may or may not be cause for concern. If you’re concerned about your heart, talk to your doctor about your symptoms.
What are the symptoms of normal and abnormal tachycardia?1
- Shortness of breath
- Weakness
- Dizziness or lightheadedness
- Fainting or near fainting
- Chest pain
What are potential causes of normal tachycardia?1
- Physical activity or exertion
- Stress or anxiety
- Dehydration
- Medications
- Underlying heart conditions
Normal tachycardia is typically not cause for concern, but tachycardia taking place due to other causes might be a reason to see your doctor.
Talk to your doctor about your symptoms.
It is important to talk to your doctor about a fast or racing heart, especially if it happens frequently.
Information on this site should not be used as a substitute for talking with your doctor. Always talk with your doctor about diagnosis and treatment information.
